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