M

  1. Mad cow disease, also known asCreutzfeldt-Jakob disease)
  2. Major depressive disorder, also known asDepression (major depressive disorder))
  3. Malaria
  4. Male breast cancer
  5. Male hypogonadism
  6. Male infertility
  7. Malignant fibrous histiocytoma, also known asUndifferentiated pleomorphic sarcoma)
  8. Malignant hyperthermia
  9. Malignant mesothelioma, also known asMesothelioma)
  10. Malignant peripheral nerve sheath tumors
  11. Mallet toe and hammertoe, also known asHammertoe and mallet toe)
  12. MALS, also known asMedian arcuate ligament syndrome (MALS))
  13. Mammary duct ectasia
  14. Manic-depressive illness, also known asBipolar disorder)
  15. Marburg virus, also known asEbola virus and Marburg virus)
  16. Marfan syndrome
  17. Mastalgia, also known asBreast pain)
  18. Mastitis
  19. MCAD deficiency
  20. MD, also known asMuscular dystrophy)
  21. Measles
  22. Measles, German, also known asRubella)
  23. Medial epicondylitis, also known asGolfer's elbow)
  24. Medial tibial stress syndrome, also known asShin splints)
  25. Median arcuate ligament syndrome (MALS)
  26. Medication overuse headaches
  27. Mediterranean anemia, also known asThalassemia)
  28. Medulloblastoma
  29. Megacolon, also known asHirschsprung's disease)
  30. Megaloblastic anemia, also known asVitamin deficiency anemia)
  31. Melanoma
  32. Melanoma of the eye, also known asEye melanoma)
  33. Membranous nephropathy
  34. Meniere's disease
  35. Meningioma
  36. Meningitis
  37. Meniscus tear, also known asTorn meniscus)
  38. Menopause
  39. Menorrhagia (heavy menstrual bleeding)
  40. Menstrual bleeding, excessive, also known asMenorrhagia (heavy menstrual bleeding))
  41. Menstrual cramps
  42. Mental illness
  43. Meralgia paresthetica
  44. Merkel cell carcinoma
  45. Mesenteric ischemia
  46. Mesenteric lymphadenitis
  47. Mesothelioma
  48. Metabolic syndrome
  49. Metachromatic leukodystrophy
  50. Metastatic brain cancer, also known asBrain metastases)
  51. Metatarsalgia
  52. Methicillin-resistant staphylococcus aureus infection, also known asMRSA infection)
  53. MGUS, also known asMonoclonal gammopathy of undetermined significance (MGUS))
  54. Microcephaly
  55. Microscopic colitis
  56. Microscopic hematuria, also known asBlood in urine (hematuria))
  57. Migraine
  58. Migraine with aura
  59. Mild cognitive impairment (MCI)
  60. Milia
  61. Miliaria, also known asHeat rash)
  62. Milk allergy
  63. Milk intolerance, also known asLactose intolerance)
  64. Miscarriage
  65. Mitral valve disease
  66. Mitral valve prolapse
  67. Mitral valve regurgitation
  68. Mitral valve stenosis
  69. Mittelschmerz
  70. Mixed connective tissue disease
  71. Molar pregnancy
  72. Mold allergy
  73. Moles
  74. Molluscum contagiosum
  75. Mono, also known asMononucleosis)
  76. Monoclonal gammopathy of undetermined significance (MGUS)
  77. Mononucleosis
  78. Mood disorders
  79. Morning sickness
  80. Morphea
  81. Morton's neuroma
  82. Mosquito bites
  83. Mouth cancer
  84. Movement disorders
  85. Moyamoya disease
  86. MRSA infection
  87. MS, also known asMultiple sclerosis)
  88. MSA, also known asMultiple system atrophy (MSA))
  89. Mucocutaneous lymph node syndrome, also known asKawasaki disease)
  90. Mucopolysaccharidosis type II, also known asHunter syndrome)
  91. Multiple endocrine neoplasia type 1, also known asMultiple endocrine neoplasia, type 1 (MEN 1))
  92. Multiple endocrine neoplasia, type 1 (MEN 1)
  93. Multiple myeloma
  94. Multiple personality disorder, also known asDissociative disorders)
  95. Multiple sclerosis
  96. Multiple system atrophy (MSA)
  97. Multisystem inflammatory syndrome in children (MIS-C)
  98. Mumps
  99. Muscle cramp
  100. Muscle strains
  101. Muscular dystrophy
  102. Myasthenia gravis
  103. Myelodysplastic syndromes
  104. Myelofibrosis
  105. Myocardial infarction, also known asHeart attack)
  106. Myocardial ischemia
  107. Myocarditis
  108. Myoclonus
  109. Myofascial pain syndrome
  110. Myopia, also known asNearsightedness)
  111. Myxofibrosarcoma
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