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. Fetal alcohol syndrome
  18. Fetal macrosomia
  19. Fever
  20. Fever blister (See: Cold sore)
  21. Fever, valley (See: Valley fever)
  22. Fevers, viral hemorrhagic (See: Viral hemorrhagic fevers)
  23. FH (See: Familial hypercholesterolemia)
  24. Fibroadenoma
  25. Fibrocystic breasts
  26. Fibromuscular dysplasia
  27. Fibromyalgia
  28. Fibrosis, cystic (See: Cystic fibrosis)
  29. Fibrosis, interstitial pulmonary (See: Interstitial lung disease)
  30. Fibrosis, pulmonary (See: Pulmonary fibrosis)
  31. Fibrous dysplasia
  32. Fifth disease (See: Parvovirus infection)
  33. Filoviruses (See: Viral hemorrhagic fevers)
  34. Flatfeet
  35. Flaviviruses (See: Viral hemorrhagic fevers)
  36. Floaters (See: Eye floaters)
  37. Floor of the mouth cancer
  38. Floppy valve syndrome (See: Mitral valve prolapse)
  39. Flu (See: Influenza (flu))
  40. Flu, avian (See: Bird flu (avian influenza))
  41. Flu, bird (See: Bird flu (avian influenza))
  42. Flu, swine (See: Swine flu (H1N1 flu))
  43. Fluid around the heart (See: Pericardial effusion)
  44. Focal segmental glomerulosclerosis (FSGS)
  45. Folate deficiency anemia (See: Vitamin deficiency anemia)
  46. Folliculitis
  47. Food allergy
  48. Food allergy, egg (See: Egg allergy)
  49. Food allergy, milk (See: Milk allergy)
  50. Food poisoning
  51. Food-borne illness (See: Food poisoning)
  52. Foot drop
  53. Foot fracture (See: Broken foot)
  54. Foramen ovale (See: Patent foramen ovale)
  55. Fracture, arm (See: Broken arm)
  56. Fracture, greenstick (See: Greenstick fractures)
  57. Fracture, growth plate (See: Growth plate fractures)
  58. Fracture, hip (See: Hip fracture)
  59. Fracture, incomplete (See: Greenstick fractures)
  60. Fracture, leg (See: Broken leg)
  61. Fracture, stress (See: Stress fractures)
  62. Fractured nose (See: Broken nose)
  63. Fractured ribs (See: Broken ribs)
  64. Frontal lobe epilepsy (See: Frontal lobe seizures)
  65. Frontal lobe seizures
  66. Frontotemporal dementia
  67. Frontotemporal lobar degeneration (See: Frontotemporal dementia)
  68. Frostbite
  69. Frozen shoulder
  70. FSGS (See: Focal segmental glomerulosclerosis (FSGS))
  71. Fuchs' dystrophy
  72. Fugue, dissociative (See: Dissociative disorders)
  73. Functional dyspepsia (See: Nonulcer stomach pain)
  74. Functional neurologic disorders/conversion disorder
  75. Fungal infection, nail (See: Nail fungus)
  76. Funnel chest (See: Pectus excavatum)
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