Rabies
Radiation sickness
Radiculoplexus neuropathy (diabetic amyotrophy)
Ramsay Hunt syndrome
Raynaud's disease
Reactive airway disease
Reactive arthritis
Reactive attachment disorder
Rebound headaches
Rectocele
Rectovaginal fistula
Recurrent breast cancer
Respiratory syncytial virus (RSV)
Restless legs syndrome
Retinal detachment
Retinoblastoma
Retractile testicle
Retrograde ejaculation
Rett syndrome
Reye's syndrome
Rheumatic fever
Rheumatoid arthritis
Rickets
Ringworm, body
Ringworm, scalp
Rocky Mountain spotted fever
Rosacea
Roseola
Rotator cuff injury
Rotavirus
Rubella
Ruptured eardrum (perforated eardrum)
Ruptured spleen