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. 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. Median arcuate ligament syndrome (MALS)
  25. Medication overuse headaches
  26. Mediterranean anemia, also known asThalassemia)
  27. Medulloblastoma
  28. Megacolon, also known asHirschsprung's disease)
  29. Megaloblastic anemia, also known asVitamin deficiency anemia)
  30. Melanoma
  31. Melanoma of the eye, also known asEye melanoma)
  32. Membranous nephropathy
  33. MEN 2, also known asMultiple endocrine neoplasia, type 2 (MEN 2))
  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. Miliaria, also known asHeat rash)
  61. Milk allergy
  62. Milk intolerance, also known asLactose intolerance)
  63. Miscarriage
  64. Mitral valve disease
  65. Mitral valve prolapse
  66. Mitral valve regurgitation
  67. Mitral valve stenosis
  68. Mittelschmerz
  69. Mixed connective tissue disease
  70. Molar pregnancy
  71. Mold allergy
  72. Moles
  73. Molluscum contagiosum
  74. Mono, also known asMononucleosis)
  75. Monoclonal gammopathy of undetermined significance (MGUS)
  76. Mononucleosis
  77. Mood disorders
  78. Morning sickness
  79. Morphea
  80. Morton's neuroma
  81. Mosquito bites
  82. Mouth cancer
  83. Movement disorders
  84. Moyamoya disease
  85. MRSA infection
  86. MS, also known asMultiple sclerosis)
  87. MSA, also known asMultiple system atrophy (MSA))
  88. Mucocutaneous lymph node syndrome, also known asKawasaki disease)
  89. Mucopolysaccharidosis type II, also known asHunter syndrome)
  90. Multiple endocrine neoplasia type 1, also known asMultiple endocrine neoplasia, type 1 (MEN 1))
  91. Multiple endocrine neoplasia, type 1 (MEN 1)
  92. Multiple endocrine neoplasia, type 2 (MEN 2)
  93. Multiple myeloma
  94. Multiple sclerosis
  95. Multiple system atrophy (MSA)
  96. Multisystem inflammatory syndrome in children (MIS-C)
  97. Mumps
  98. Muscle cramp
  99. Muscle strains
  100. Muscular dystrophy
  101. Myasthenia gravis
  102. Myelodysplastic syndromes
  103. Myelofibrosis
  104. Myocardial infarction, also known asHeart attack)
  105. Myocardial ischemia
  106. Myocarditis
  107. Myoclonus
  108. Myofascial pain syndrome
  109. Myopia, also known asNearsightedness)
  110. Myxofibrosarcoma
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