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Marshall-Smith syndrome
Marshall-Smith syndrome (MSS, OMIM 602535, ORPHA:561), also called accelerated skeletal maturation-facial dysmorphism-failure to thrive syndrome, is an ultra-rare autosomal dominant NFIX disorder with advanced bone maturation, airway obstruction, and intellectual disability.
Marstacimab
Marstacimab (HYMPAVZI, marstacimab-hncq) is Pfizer's anti-TFPI IgG1 monoclonal antibody, approved by the FDA in 2024 and expanded in 2026, for weekly subcutaneous prophylaxis in hemophilia A or B with or without inhibitors.
Marsupialization
Marsupialization is a surgical technique that opens a cyst or abscess and sutures its edges to the skin, creating a permanently open pouch that drains it.
Martha Lillard
Martha Ann Lillard (1948–2026), Oklahoma polio survivor, was the last known American using an iron lung, from 1953 until her death on June 26, 2026, in Shawnee, aged 78, after long-haul COVID-19.
Martha's Rule
Martha's Rule is an NHS England patient safety measure letting patients, families, and staff trigger 24/7 rapid review by an independent team when deterioration is suspected. Named for Martha Mills, piloted at 143 sites in 2024, in all acute hospitals by 2025, mandatory by March 2027.
Martin Cherkasky
Martin Cherkasky (1912–1997) was an American physician and hospital administrator who led Montefiore Medical Center in the Bronx for three decades and advised Mayor Koch on health.
Martin Klein (engineer)
Martin Klein Consultants is the current consultancy of Martin Klein, the engineer who founded Klein Associates in 1968 and pioneered the first commercially successful side scan sonar systems.
Martin McKee
Martin McKee, born Clifford Martin McKee in 1956, is a Northern Ireland–trained physician and professor of European public health at the London School of Hygiene and Tropical Medicine.
Martin Pistorius
Martin Pistorius (born 1975, Johannesburg), author of the memoir Ghost Boy, fell into an unexplained locked-in state at age 12 in 1988; aware but unable to move or speak for about 10 years, he communicated via eye-movement computer software from 2001 and now works in assistive technology.
Martin R. Gluck
Martin R. Gluck (1957–2023) was an American neurologist and neuroscientist at the Bronx VA Medical Center and Mount Sinai, known for research on dopamine oxidation and mitochondrial dysfunction in Parkinson's disease.
Martin Shkreli
Martin Shkreli, "Pharma Bro", former Turing Pharmaceuticals CEO who raised Daraprim's price from $13.50 to $750, was convicted of securities fraud in 2017, ordered to disgorge $64.6 million, banned for life from pharma, and lost the Wu-Tang album Once Upon a Time in Shaolin.
Martin Van Buren Bates
Martin Van Buren Bates, the Kentucky Giant (1837-1919), a 7'9" Confederate captain and circus performer who married the 7'11" giantess Anna Swan in London in 1871 and farmed in Seville, Ohio.
Martín-Josè Sepúlveda
Martín-Josè Sepúlveda is a physician and public health researcher who spent three decades at IBM and is now a Distinguished University Professor at Florida International University.
Martinique crinkled retinal pigment epitheliopathy
Martinique crinkled retinal pigment epitheliopathy (MCRPE, MDPT3, patterned macular dystrophy 3) is an ultra-rare autosomal dominant retinal dystrophy from MAPKAPK3 mutations, first described in Martinique, with a dry-desert-land fundus pattern, adult onset, and PCV or CNV complications.
Marty Makary
Marty Makary, or Martin A. Makary, is an American pancreatic surgeon, Johns Hopkins professor, and author who served as the 27th FDA Commissioner from 2025 to 2026.
Martyn Ford (bodybuilder)
Martyn Ford, "The Nightmare" (born 1982, Minworth, Birmingham), English bodybuilder, actor and influencer, 6'8" claimed, ~320 lb; former Warwickshire cricketer; films include Kingsman, F9, Mortal Kombat II; signed with KSW for MMA.
MARVELTAVI trial
MARVELTAVI (MARVEL TAVI) is a listed upcoming clinical study of the Myval balloon-expandable transcatheter heart valve series by Meril Lifesciences, alongside completed Myval trials LANDMARK and COMPARE-TAVI 1.
Mary Anne Koda-Kimble
Mary Anne Koda-Kimble is an American pharmacist who served as dean of the UCSF School of Pharmacy from 1998 to 2012, the school's first female and first clinician dean.
Mary Claire Haver
Mary Claire Haver, American board-certified OB-GYN and Menopause Society Certified Practitioner, founder of The 'Pause Life and Mary Claire Wellness Clinic, author of The Galveston Diet and the NYT bestseller The New Menopause, and prominent advocate for menopausal hormone therapy.
Mary D. Naylor
Mary D. Naylor is an American nurse-scientist at the University of Pennsylvania School of Nursing, architect of the Transitional Care Model and winner of the 2022 Gustav O. Lienhard Award.
Mary E. D’Alton
Mary E. D'Alton is an Irish-born maternal-fetal medicine specialist who is Obstetrician and Gynecologist-in-Chief at Columbia University Irving Medical Center, elected to the National Academy of Medicine in 2013.
Mary Edwards Walker
Mary Edwards Walker (1832–1919), American Civil War surgeon, suffragist, and dress-reform advocate; first female U.S. Army surgeon, Castle Thunder POW, and the only woman ever awarded the Medal of Honor, revoked 1917, restored 1977.
Mary Jo Trepka
Mary Jo Trepka is an American infectious disease and health-disparities epidemiologist who chairs epidemiology at Florida International University and received the 2010 Presidential Early Career Award from President Obama.
Mary Mallon
Mary Mallon (1869-1938), "Typhoid Mary", Irish-born New York cook and first identified asymptomatic carrier of Salmonella typhi in the US; infected at least 122 people and spent about 26 years quarantined on North Brother Island.
Mary Seacole
Mary Seacole (1805–1881), Jamaican-born doctress and businesswoman, Mother Seacole of the Crimean War; rejected as an army nurse, she funded her own passage, ran the British Hotel near Balaklava, and wrote the first autobiography by a black woman in Britain (1857).
Masculinizing hormone therapy
Masculinizing hormone therapy is a gender-affirming treatment giving testosterone to transgender men and trans masculine people, inducing masculine characteristics, suppressing menstruation, and reducing dysphoria.
Masikadya Taila
Masikadya Taila (Mūṣikādya taila, AFI000480) is a classical Ayurvedic medicated oil containing rat meat, cow milk, sesame oil, and root drugs, indicated for rectal prolapse (gudabhramsa) and female genital prolapse.
Masquelet technique
The Masquelet technique, also called the induced membrane technique, is a two-stage operation for large bone defects using a cement spacer that induces a membrane hosting a bone graft.
Mass balance study
A mass balance study, also called a human ADME study, is a clinical pharmacokinetic study using a radiolabeled drug dose to track absorption, metabolism, and excretion.
Mass Chest X-Ray
Mass chest X-ray, known as mass miniature radiography, screens large populations for tuberculosis and heart and lung disease, widely used from the 1930s to the 1960s.