Latest / Morning Medical with Dr. Chow / AI Breast Cancer Screening, Night Owl Heart Risks, and US Medical Education Reform

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AI Breast Cancer Screening, Night Owl Heart Risks, and US Medical Education Reform · Morning Medical with Dr. Chow

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Good morning, listeners, and welcome back to Morning Medical with Dr.
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Chow.
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I'm your host, Dr.
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Chi-Ming Chow, coming to you from Toronto, Ontario, Canada.
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As always, we're here to bring you the latest in medical and health news from around the
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globe, powered by artificial intelligence.
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Today, we've got a fascinating lineup of topics to discuss, so let's dive right in.
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Our first story today comes from a recent investigation by the BBC into a potential link
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between weight-loss injections and an increase in gallbladder removals.
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The National Health Service in England recorded more than eighty thousand gallbladder surgeries
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in the year 2024 to 2025, marking the highest peak in the past decade.
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This has raised questions among medical professionals about whether the rise in these
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surgeries could be connected to the growing use of weight-loss injections, like Mounjaro,
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Wegovy, and Saxenda.
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Ahmed Ahmed, the president of the British Obesity and Metabolic Specialist Society, has
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noticed an increase in patients needing gallbladder surgeries, with many reporting they
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had used weight-loss injections.
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Gallstones, which are hard deposits made of cholesterol and bile, are known to be a common
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side effect of these injections.
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The UK's Medicines and Healthcare products Regulatory Agency has updated its guidance on
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these injections, highlighting the risk of acute pancreatitis, which is often linked to
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gallstones.
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Dr.
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Ahmed, who also performs gastric band surgeries, pointed out that it's still unclear
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whether the injections themselves cause gallstones, or if it's the rapid weight loss
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from using these injections that leads to their formation.
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This uncertainty calls for more research to determine whether there's a direct causative
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link.
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He has advocated for a high-quality research trial comparing weight-loss injections with
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bariatric surgery to evaluate clinical and cost-effectiveness.
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The story of Sue Peacock from Wirral, Merseyside, highlights the potential risks.
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After starting Mounjaro, she was diagnosed with gallstones and later developed pancreatitis, a
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serious inflammatory disease.
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She described her experience as life-changing, bringing her own mortality into focus.
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Despite these concerns, many people like Steve O'Farrell from Bristol have found success with
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these injections, losing significant weight and gaining energy, although he acknowledges the
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potential risks.
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The National Health Service considers gallbladder removal a common and generally safe
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procedure, but as with any surgery, it carries risks.
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Consultant surgeons like James Hewes emphasize the importance of patients discussing the
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potential benefits and risks of weight-loss injections with their healthcare providers.
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They also suggest that losing weight in a slower and more controlled manner may reduce
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the risk of developing gallstones.
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The manufacturers of these weight-loss injections, such as Eli Lilly and Novo Nordisk,
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stress that patient safety is a top priority and encourage anyone experiencing side effects
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to consult their healthcare provider and report issues through the appropriate channels.
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As we continue to see the impact of these modern weight-loss solutions, it's crucial that
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we balance their benefits with a careful consideration of any potential health risks.
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Our next story is about a significant advancement in breast cancer screening.
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A recent randomized trial, known as the MASAI trial, has provided more evidence supporting
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the use of artificial intelligence in mammography.
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This study has shown that AI-supported mammography has a noninferior rate of interval
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cancers compared to the traditional method of double reading by radiologists.
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This is an exciting development in the field of diagnostic radiology.
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The trial involved over one hundred and five thousand women and revealed that the interval
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cancer rates were 1.55 per one thousand participants in the AI-supported group,
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compared to 1.76 in the control group, which was led by radiologists.
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This demonstrates a noninferior proportion ratio of 0.88.
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The researchers, led by Kristina Lång, Doctor of Philosophy, from Lund University in Malmö,
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Sweden, published these findings in The Lancet journal.
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What makes these findings particularly noteworthy is that the use of AI resulted not
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only in maintaining the cancer detection rate but also in improving sensitivity to 80.5
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percent compared to 73.8 percent with the traditional double reading method.
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Interestingly, the specificity remained the same at 98.5 percent.
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This suggests that AI can enhance screening performance while significantly reducing the
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workload associated with screening mammograms.
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The trial reported a 12 percent reduction in interval cancers and a 16 percent reduction in
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invasive interval cancers with AI-supported screening.
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Furthermore, it noted fewer non-luminal A subtypes and a similar number of luminal A
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subtypes.
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The use of AI also led to fewer invasive interval cancers across various histological
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grades and tumor sizes, including a 21 percent reduction in T2+ interval cancers.
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One of the standout results of the MASAI trial was the substantial reduction in screening
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workload.
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The AI-supported mammography cut the workload by 44 percent while achieving a cancer
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detection rate comparable to that of two radiologists working together.
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This efficiency could be particularly beneficial in settings facing workforce
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shortages, as it allows for a more streamlined and effective screening process.
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The researchers emphasized that these findings provide a strong rationale for the broader
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implementation of AI in population-based mammography screening programs.
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However, they also highlighted the need for further analyses of subsequent screening rounds
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and cost-effectiveness to fully understand the long-term benefits and potential harms.
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In an accompanying commentary, experts like M.
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Luke Marinovich, Doctor of Philosophy, and Nehmat Houssami, Bachelor of Medicine, Bachelor
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of Surgery, from the University of Sydney, urged caution in over-interpreting the
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noninferiority findings.
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They acknowledged that while the results offer substantial reassurance, there's a need for
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careful consideration before widespread adoption.
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Some breast cancer screening programs have already begun incorporating AI into their
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workflows, and the results of the MASAI trial will likely accelerate these trends.
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Today, we're turning our attention to a new study that suggests men may face hidden heart
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risks years earlier than women.
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This enlightening research comes from Northwestern University and was published in
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the Journal of the American Heart Association.
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It highlights that men begin to develop coronary heart disease much earlier than women,
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with differences becoming noticeable as early as the mid-30s.
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The study analyzed data from over five thousand adults, aged eighteen to thirty, spanning from
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the mid-1980s to 2020.
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This research was part of the Coronary Artery Risk Development in Young Adults analysis,
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often referred to as the CARDIA study.
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It found that men reached a five percent incidence of cardiovascular disease, including
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heart attacks, strokes, and heart failure, around fifty years old.
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In contrast, women reached this same incidence at around fifty-seven years old.
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Coronary heart disease, which occurs when the blood vessels supplying the heart muscle become
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narrowed or blocked, emerged as the primary driver of this difference.
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The study noted that men reached a two percent incidence of coronary heart disease more than a
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decade before women.
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While conditions like stroke and heart failure tended to appear later in life, the risk of
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heart disease for men began to rise significantly around the age of thirty-five and
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remained high throughout midlife.
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Current guidelines generally recommend cardiovascular risk assessment beginning around
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age forty.
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However, the findings from this study suggest that this approach could miss an important
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window for early prevention, especially for men.
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The study's senior author, Alexa Freedman, an assistant professor of preventive medicine at
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Northwestern University Feinberg School of Medicine, emphasized the importance of
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promoting heart health screening and prevention in young adulthood, particularly for young men.
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The researchers also pointed out the need to look beyond standard heart risk measures, like
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cholesterol or blood pressure, and consider a broader range of biological and social factors.
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Factors such as hormonal differences, diet, and physical activity may play a role in why men
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are predisposed to heart issues earlier than women.
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Dr.
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Andrew Freeman, a cardiologist and director of clinical cardiology at National Jewish Health
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in Denver, wasn't involved in the study but offered his insights.
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He highlighted that the standard American lifestyle, which includes exposure to various
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toxins and pollutants, a sedentary lifestyle, and increased stress, could be contributing to
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the earlier manifestation of heart disease in men.
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He emphasized the need for lifestyle changes to reduce disease burden and suggested that early
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prevention efforts should apply to everyone, not just those at higher risk.
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Dr.
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Freeman recommended several "healthspan" tips to help prevent heart health issues.
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These include limiting exposure to toxins such as alcohol and tobacco, adopting a low-fat,
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whole-food, plant-based diet, engaging in regular exercise, partaking in stress-relieving
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activities, ensuring adequate sleep, and cultivating a strong support network of friends
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and family.
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Ultimately, this study underscores the importance of early intervention and lifestyle
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modifications to combat the increasing prevalence of coronary disease, particularly
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among men in the United States.
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As Dr.
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Freeman put it, if you're a man, you need to be particularly proactive about your heart health
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earlier in life.
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Our next story delves into an intriguing proposal for reforming medical education in the
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United States.
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This proposal suggests that instead of shortening medical school, the focus should be
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on reducing the time spent in college before medical training begins.
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Recent opinion pieces have advocated for compressing medical school from four years to
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three, aiming to train physicians faster, reduce student debt, and address the growing
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shortage of doctors.
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However, many experts argue that the real inefficiency lies not in the length of medical
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school, but in the prerequisite four-year undergraduate degree.
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The United States is unique in its educational pathway for aspiring doctors.
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In much of Europe, students embark on their medical training directly after high school,
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eliminating the need for a separate bachelor's degree.
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This approach shortens the journey to a medical degree from eight years in the U.S.
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to just six years in Europe.
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The impact is significant, affecting when physicians enter the workforce, the amount of
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debt they carry, and who can realistically pursue a career in medicine.
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As medical school admissions have become increasingly competitive, the timeline for
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training has stretched even further.
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Many applicants now take one or more gap years to bolster their applications, pushing the
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average age of medical school entrants from twenty-two in the 1990s to around twenty-four
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today.
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This often extends the total training period to ten years, with many students earning their
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medical degrees at twenty-eight—four years later than their European peers.
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Proponents of the current system argue that this extended pathway produces more mature and
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broadly educated physicians.
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They emphasize the importance of American medical students being well-versed in a wide
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range of subjects, from sociology to psychology.
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Yet, this breadth comes at a cost.
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For example, many students find themselves repeating the same foundational biology content
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multiple times throughout their education, leading to redundancy and inefficiency.
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Some medical schools have already recognized this problem.
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They offer early assurance programs that admit students after two years of college, provided
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they meet specific academic standards and ultimately earn their bachelor's degree.
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This approach eliminates the need for gap years and provides students with clarity earlier in
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their educational journey.
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A few schools even offer combined Bachelor of Science and Doctor of Medicine programs, but
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these are not widespread enough.
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The proposal at hand suggests expanding early assurance programs and decoupling medical
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school admission from the completion of a four-year undergraduate degree.
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Interested students could complete focused premedical requirements and apply during their
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sophomore year of college.
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Those accepted could then proceed directly into medical school, rather than remaining enrolled
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in their undergraduate program solely to earn a credential.
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Critics of this approach worry that shortening the undergraduate pathway might produce less
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well-rounded physicians or force students to commit to medicine too early.
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Others are concerned it might reduce the clinical experiences necessary to confirm
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medicine as the right career choice.
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However, given the current competitive admissions landscape, students are already
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encouraged to seek research and clinical exposure from their first year of college.
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It is crucial to preserve the four-year duration of medical school to allow students
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ample time to explore different specialties, especially in light of high levels of physician
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burnout.
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Additionally, medical school debt is on the rise and could worsen with new loan
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regulations.
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This debt is compounded by the cost of four years of undergraduate education, often
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influencing graduates' career decisions, pushing them towards higher-paying specialties
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and contributing to shortages in primary care.
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By shortening the path to becoming a physician, we could alleviate financial pressures and help
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reduce inequities in medical school admissions.
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Importantly, students not accepted early would still have the opportunity to pivot, change
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majors, or pursue different career paths, rather than discovering years later that
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medical school is no longer an option.
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While many agree that the process of becoming a doctor should be more efficient and equitable,
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the solution lies not in compressing medical school but in rethinking the journey that leads
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there.
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In an intriguing turn of events, a recent study has shed new light on the age-old question of
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what factors most significantly contribute to our lifespan.
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While it's long been believed that lifestyle choices like diet and exercise are the primary
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determinants of how long we live, this new research suggests that our genetics may play a
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much larger role than previously thought.
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The study, which was published in the journal Science, indicates that genetics account for
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over half of the differences in lifespan among individuals.
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This is a substantial increase from earlier estimates and has significant implications for
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how we understand longevity.
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Dr.
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Uri Alon, the lead author of the study from the Weizmann Institute of Science in Israel,
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explains that by eliminating historical data that included factors such as infectious
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diseases and accidents, the genetic component of lifespan becomes much clearer.
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Dr.
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Deborah Kado, co-director of the Stanford Longevity Center, who was not involved in the
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study, shared her thoughts on these findings.
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She noted that while the idea of genetics playing a significant role in lifespan isn't
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entirely surprising, it reaffirms the complexity of longevity as a trait shaped by
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both nature and nurture.
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This complexity is similar to other traits like cholesterol levels and osteoporosis risk, which
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are influenced by multiple genes and lifestyle factors.
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Despite the significant role of genetics, the study emphasizes that individuals still have
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considerable control over their lifespan.
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According to Dr.
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Alon, lifestyle choices such as exercise, diet, and maintaining social connections can
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potentially extend a person's genetically predisposed lifespan by about five years.
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This means that while genetics may set a baseline, our choices can either enhance or
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diminish our longevity.
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Interestingly, life expectancy in the United States reached a record high of seventy-nine
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years in 2024.
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However, the average life expectancy has been subject to fluctuations, particularly around
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the COVID-19 pandemic.
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Dr.
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Kado points out that despite the allure of products promising to extend life, the real
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keys to longevity remain consistent: regular exercise, a balanced diet, and strong social
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ties.
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When it comes to the genes that influence longevity, the study suggests that the picture
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is highly complex.
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Dr.
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Kado emphasizes that there isn't a single gene responsible for determining our lifespan.
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Instead, it's a combination of many genetic factors that interact with environmental
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influences.
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As our understanding of these biological building blocks grows, we may eventually be
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able to develop interventions that target specific pathways to extend lifespan.
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However, Dr.
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Dan Arking from Johns Hopkins University, who studies aging, raises an important point.
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He argues that the true value lies not just in living longer, but in living healthier for
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longer.
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Reducing the risk of age-related diseases can enhance the quality of life during the years we
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do have, even if extending maximum lifespan proves challenging.
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The study also touches on the debate over whether there's an upper limit to human
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lifespan.
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With the maximum recorded age being one hundred and twenty-two years, there's speculation about
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whether it's possible to extend this further.
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Dr.
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Alon suggests that while average life expectancy has doubled over the past century
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and a half, the maximum lifespan hasn't seen much change, indicating the potential
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challenges in pushing this boundary further.
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Ultimately, this study serves as a reminder of the complex interplay between genetics and
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lifestyle in determining lifespan.
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While we can't change our genetic makeup, the choices we make every day can have a profound
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impact on how those genes express themselves in terms of longevity.
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As research in this field progresses, it may open new avenues for enhancing both the quality
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and quantity of life.
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In a recent study published in the Journal of the American Heart Association, researchers
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have found that individuals who identify as night owls—those who naturally prefer staying
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up late—may face a higher risk of developing heart disease.
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This study, which analyzed data from over three hundred twenty-two thousand adults
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participating in the UK Biobank, suggests that night owls, particularly middle-aged and older
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adults, may have poorer heart health compared to those with morning or intermediate
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chronotypes.
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The study's lead author, Dr.
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Sina Kianersi, a postdoctoral research fellow at Brigham and Women's Hospital and Harvard
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Medical School, explains that chronotypes reflect a person's natural preference for sleep
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timing and daily rhythms.
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Participants in the study categorized themselves as morning, intermediate, or evening
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types based on their sleep-wake timing preference, rather than specific wake or
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bedtimes.
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Interestingly, the study found that night owls were more likely to engage in unhealthy habits
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or have risk factors such as poor diet, less exercise, or smoking.
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When compared to intermediate chronotypes, night owls were about seventy-nine percent more
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likely to have overall poor cardiovascular health and had a higher risk of heart attack or
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stroke.
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This association was particularly pronounced in women.
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Dr.
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Sabra Abbott, an associate professor of neurology at Northwestern University's Feinberg
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School of Medicine, who was not involved in the study, highlighted that being an evening
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chronotype is often linked with irregular sleep, meal, and light exposure patterns, which
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can increase cardiovascular disease risk.
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The study reported that night owls had a sixteen percent higher risk of developing
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cardiovascular disease over nearly fourteen years of follow-up compared to intermediate
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chronotypes.
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The study's focus on middle-aged and older adults suggests that more research is needed to
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determine if these patterns hold true for younger populations.
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Dr.
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Kianersi noted that as an observational study, it cannot definitively prove that being a night
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owl directly causes poorer cardiovascular health or increased cardiovascular risk.
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Nonetheless, there's hope for night owls.
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Dr.
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Kristen Knutson, an associate professor of neurology at the Feinberg School of Medicine's
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Center for Circadian and Sleep Medicine, advises that cardiovascular disease is not an
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inherent fate for night owls.
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Prioritizing sleep, avoiding smoking, and focusing on modifiable risk factors, such as
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maintaining a healthy lifestyle, can help mitigate these risks.
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Both Dr.
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Knutson and Dr.
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Kianersi recommend not trying to change one's chronotype but instead focusing on controllable
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factors.
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Dr.
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Kianersi advises aiming for sufficient sleep, maintaining consistent sleep and wake times,
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getting morning light exposure, engaging in regular physical activity, and staying on top
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of routine health checks for blood pressure, cholesterol, and blood sugar.
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Quitting smoking remains one of the most effective steps for protecting long-term heart
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health.
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Our final story today brings us to a remarkable development in the field of ophthalmology.
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The United States Food and Drug Administration has approved a new eye drop solution called
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Yuvezzi, which combines carbachol and brimonidine tartrate, offering a groundbreaking
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treatment for presbyopia.
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This condition, often associated with aging, affects an estimated one hundred twenty-eight
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million adults in the United States and two billion worldwide, leading to a progressive
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decline in near vision.
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Presbyopia typically begins to affect individuals around the age of forty-five and
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stabilizes by age sixty-five.
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Until now, the primary solutions have been reading glasses, multifocal lenses, or contact
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lenses.
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Surgical interventions are available but are not widely accepted due to their variability in
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outcomes.
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The approval of Yuvezzi marks the first time a dual-agent eye drop therapy has been offered
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for this common age-related vision decline, providing a non-invasive alternative to
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traditional methods.
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The new eye drops, developed by Tenpoint Therapeutics, are designed to be used once
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daily and work by employing two active ingredients with distinct mechanisms of action.
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Carbachol and brimonidine tartrate together enhance near vision while maintaining
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tolerability throughout the day.
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According to Dr.
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John Hovanesian from Harvard Eye Associates, Yuvezzi offers a novel approach that addresses
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the real-world needs of those struggling with close-up tasks without the need for glasses or
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surgery.
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The approval of Yuvezzi was supported by the phase three BRIO I and II clinical trials,
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which demonstrated significant improvements in near vision.
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Notably, in the BRIO II trial, the combination eye drops showed superior outcomes compared to
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the individual components, with improved endpoints in binocular uncorrected near visual
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acuity over an eight-hour period.
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Importantly, these improvements were achieved without compromising distance visual acuity.
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While the most common side effects reported include headache, impaired vision, and
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temporary eye irritation, these were generally well-tolerated.
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Interestingly, the incidence of hyperemia, or eye redness, was lower with the combination
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drops compared to carbachol alone.
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This indicates a favorable side effect profile for Yuvezzi, making it a promising option for
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those affected by presbyopia.
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With the introduction of Yuvezzi, individuals experiencing age-related vision decline have a
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new, effective, and non-invasive treatment option.
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As presbyopia remains a widespread issue, advancements such as these are crucial in
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improving the quality of life for millions.
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It's exciting to see how this new therapeutic approach will be adopted and its potential
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impact on the standard management of presbyopia.
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And that wraps up today's episode of Morning Medical with Dr.
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Chow.
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Thank you for tuning in and joining me on this journey through the latest medical and health
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news.
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Remember, staying informed is key to maintaining your health and wellness.
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I'll be back tomorrow with more updates to keep you in the know.
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Until then, take care and stay healthy.