1. Facial hair, excess in women (See: Hirsutism)
  2. Facial palsy (See: Bell's palsy)
  3. Factitious disorder
  4. Factor V Leiden
  5. Fallen arches (See: Flatfeet)
  6. Fallot, tetralogy of (See: Tetralogy of Fallot)
  7. Familial adenomatous polyposis
  8. Familial hypercholesterolemia
  9. Familial Mediterranean fever
  10. Familial paroxysmal peritonitis (See: Familial Mediterranean fever)
  11. FAP (See: Familial adenomatous polyposis)
  12. Farsightedness
  13. Febrile seizure
  14. Fecal incontinence
  15. Female infertility
  16. Female sexual dysfunction
  17. Femoroacetabular impingement (See: Hip impingement)
  18. Fetal alcohol syndrome
  19. Fetal macrosomia
  20. Fever
  21. Fever blister (See: Cold sore)
  22. Fever, valley (See: Valley fever)
  23. Fevers, viral hemorrhagic (See: Viral hemorrhagic fevers)
  24. FH (See: Familial hypercholesterolemia)
  25. Fibroadenoma
  26. Fibrocystic breasts
  27. Fibromuscular dysplasia
  28. Fibromyalgia
  29. Fibrosis, cystic (See: Cystic fibrosis)
  30. Fibrosis, cystic (See: Cystic fibrosis)
  31. Fibrosis, interstitial pulmonary (See: Interstitial lung disease)
  32. Fibrosis, pulmonary (See: Pulmonary fibrosis)
  33. Fibrous dysplasia
  34. Fifth disease (See: Parvovirus infection)
  35. Filoviruses (See: Viral hemorrhagic fevers)
  36. Flatfeet
  37. Flaviviruses (See: Viral hemorrhagic fevers)
  38. Floaters (See: Eye floaters)
  39. Floor of the mouth cancer
  40. Floppy valve syndrome (See: Mitral valve prolapse)
  41. Flu (See: Influenza (flu))
  42. Flu, avian (See: Bird flu (avian influenza))
  43. Flu, bird (See: Bird flu (avian influenza))
  44. Flu, swine (See: Swine flu (H1N1 flu))
  45. Fluid around the heart (See: Pericardial effusion)
  46. Focal segmental glomerulosclerosis (FSGS)
  47. Folate deficiency anemia (See: Vitamin deficiency anemia)
  48. Folliculitis
  49. Food allergy
  50. Food allergy, egg (See: Egg allergy)
  51. Food allergy, milk (See: Milk allergy)
  52. Food poisoning
  53. Food-borne illness (See: Food poisoning)
  54. Foot drop
  55. Foot fracture (See: Broken foot)
  56. Foramen ovale (See: Patent foramen ovale)
  57. Fracture, arm (See: Broken arm)
  58. Fracture, greenstick (See: Greenstick fractures)
  59. Fracture, growth plate (See: Growth plate fractures)
  60. Fracture, hip (See: Hip fracture)
  61. Fracture, incomplete (See: Greenstick fractures)
  62. Fracture, leg (See: Broken leg)
  63. Fracture, stress (See: Stress fractures)
  64. Fractured nose (See: Broken nose)
  65. Fractured ribs (See: Broken ribs)
  66. Frontal lobe epilepsy (See: Frontal lobe seizures)
  67. Frontal lobe seizures
  68. Frontotemporal dementia
  69. Frontotemporal lobar degeneration (See: Frontotemporal dementia)
  70. Frostbite
  71. Frozen shoulder
  72. FSGS (See: Focal segmental glomerulosclerosis (FSGS))
  73. Fuchs' dystrophy
  74. Fugue, dissociative (See: Dissociative disorders)
  75. Functional dyspepsia
  76. Functional neurologic disorders/conversion disorder
  77. Fungal infection, nail (See: Nail fungus)
  78. Funnel chest (See: Pectus excavatum)
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