1. RA, also known asRheumatoid arthritis)
  2. Rabies
  3. Radiation enteritis
  4. Radiation sickness
  5. Ramsay Hunt syndrome
  6. Rapid gastric emptying, also known asDumping syndrome)
  7. Rapid heartbeat, also known asTachycardia)
  8. Rash, poison ivy, also known asPoison ivy rash)
  9. Raynaud's disease
  10. Reactive arthritis
  11. Reactive attachment disorder
  12. Reading disability, specific, also known asDyslexia)
  13. Rebound headache, also known asMedication overuse headaches)
  14. Rectal cancer
  15. Rectal inflammation, also known asProctitis)
  16. Rectal itching, also known asAnal itching)
  17. Rectal prolapse
  18. Rectal ulcer, also known asSolitary rectal ulcer syndrome)
  19. Rectovaginal fistula
  20. Recurrent breast cancer
  21. Recurrent oral ulcers, also known asCanker sore)
  22. Red eye, also known asSubconjunctival hemorrhage (broken blood vessel in eye))
  23. Reflux, bile, also known asBile reflux)
  24. Reflux, vesicoureteral, also known asVesicoureteral reflux)
  25. Regurgitation, aortic valve, also known asAortic valve regurgitation)
  26. Regurgitation, mitral valve, also known asMitral valve regurgitation)
  27. Reiter's syndrome, also known asReactive arthritis)
  28. REM sleep behavior disorder
  29. Renal artery stenosis
  30. Renal cancer, also known asKidney cancer)
  31. Renal failure, acute, also known asAcute kidney failure)
  32. Renal lithiasis, also known asKidney stones)
  33. Residual limb pain
  34. Respiratory syncytial virus (RSV)
  35. Restless legs syndrome
  36. Retinal detachment
  37. Retinal diseases
  38. Retinoblastoma
  39. Retinopathy, diabetic, also known asDiabetic retinopathy)
  40. Retractile testicle
  41. Retrograde ejaculation
  42. Rett syndrome
  43. Reye's syndrome
  44. Rhabdomyosarcoma
  45. Rheumatic fever
  46. Rheumatoid arthritis
  47. Rhinitis, allergic, also known asHay fever)
  48. Rhinitis, nonallergic, also known asNonallergic rhinitis)
  49. Rhinitis, vasomotor, also known asNonallergic rhinitis)
  50. Rib fracture, also known asBroken ribs)
  51. Rickets
  52. Rift Valley fever, also known asViral hemorrhagic fevers)
  53. Ringing in the ear, also known asTinnitus)
  54. Ringworm (body)
  55. Ringworm (scalp)
  56. Ringworm of the foot, also known asAthlete's foot)
  57. RLS, also known asRestless legs syndrome)
  58. Road rage, also known asIntermittent explosive disorder)
  59. Rosacea
  60. Roseola
  61. Rotator cuff injury
  62. Rotavirus
  63. Round back, also known asKyphosis)
  64. RSV, also known asRespiratory syncytial virus (RSV))
  65. Rubella
  66. Rubeola, also known asMeasles)
  67. Rumination syndrome
  68. Runner's knee, also known asPatellofemoral pain syndrome)
  69. Ruptured disk, also known asHerniated disk)
  70. Ruptured eardrum (perforated eardrum)
  71. Ruptured spleen
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