Ma
Macular degeneration, dry
Macular degeneration, wet
Mad cow disease
Major depressive disorder
Malaria
Male breast cancer
Male hypogonadism
Male infertility
Malignant fibrous histiocytoma
Malignant hyperthermia
Malignant mesothelioma
See
Mesothelioma
Malignant peripheral nerve sheath tumors
Mallet toe and hammertoe
MALS
Mammary duct ectasia
Manic-depressive illness
Marfan syndrome
MASLD
Mastalgia
See
Breast pain
Mastitis
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Me
ME/CFS
Measles
Measles, German
See
Rubella
Medial epicondylitis
Medial tibial stress syndrome
See
Shin splints
Median arcuate ligament syndrome (MALS)
Medication overuse headaches
Mediterranean anemia
See
Thalassemia
Medulloblastoma
Megacolon
Megaloblastic anemia
Melanoma
Melanoma of the eye
See
Eye melanoma
MEN 2
Meniere's disease
Meningioma
Meningitis
Meniscus tear
Menopause
Menorrhagia
Menstrual cramps
Mental illness
Meralgia paresthetica
Merkel cell carcinoma
Mesenteric ischemia
Mesenteric lymphadenitis
Mesothelioma
Metabolic dysfunction-associated steatotic liver disease
Metabolic syndrome
Metachromatic leukodystrophy
Metastatic prostate cancer
Metatarsalgia
Methicillin-resistant staphylococcus aureus infection
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Mi
Microcephaly
Microscopic colitis
Microscopic hematuria
Migraine
Migraine with aura
Mild cognitive impairment (MCI)
Miliaria
See
Heat rash
Milk allergy
Milk intolerance
Miscarriage
Mitral valve disease
Mitral valve prolapse
Mitral valve regurgitation
Mitral valve stenosis
Mittelschmerz
Mixed connective tissue disease
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Mo
MOG antibody-associated disorder
MOGAD
Molar pregnancy
Mold allergy
Moles
Molluscum contagiosum
Mono
Monoclonal gammopathy of undetermined significance (MGUS)
Mononucleosis
Mood disorders
Morning sickness
Morphea
Morton's neuroma
Mosquito bites
Mouth cancer
Movement disorders
Moyamoya disease
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Mu
Mucocutaneous lymph node syndrome
Multiple endocrine neoplasia type 1
Multiple endocrine neoplasia, type 1 (MEN 1)
Multiple endocrine neoplasia, type 2 (MEN 2)
Multiple myeloma
Multiple sclerosis
Multiple system atrophy
Multisystem inflammatory syndrome in children (MIS-C)
Mumps
Muscle cramp
Muscle strains
Muscular dystrophy
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My
Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS)
Myasthenia gravis
Myelin oligodendrocyte glycoprotein antibody-associated disease (MOGAD)
Myelodysplastic syndromes
Myelofibrosis
Myocardial infarction
See
Heart attack
Myocardial ischemia
Myocarditis
Myoclonus
Myofascial pain syndrome
Bursitis
Myxofibrosarcoma
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