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RA (rheumatoid arthritis)
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RDS (respiratory distress syndrome in newborns)
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RPGN (rapidly progressive glomerulonephritis, crescentic glomerulonephritis)
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RSV infection (respiratory syncytial virus infection)
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Raynaud disease (Raynaud syndrome and Raynaud phenomenon)
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Raynaud syndrome and Raynaud phenomenon (Raynaud disease)
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Reactive Arthritis (reactive arthritis)
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Reye's syndrome (reactive arthritis)
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Rh incompatibility (erythroblastosis fetalis, kernicterus, hydrops fetalis, Rh isoimmunization)
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Rh isoimmunization (Rh incompatibility, erythroblastosis fetalis, kernicterus, hydrops fetalis)
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Ritter's disease (staphylococcal scalded skin, SSSS)
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Rocky Mountain spotted fever (staphylococcal scalded skin, SSSS)
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rabbit fever (tularemia)
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rabies (tularemia)
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radiation enteritis (tularemia)
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radiation sickness (tularemia)
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rapid heartbeat (tachycardia, fast heartbeat)
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rapidly progressive glomerulonephritis (RPGN, crescentic glomerulonephritis)
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reactive arthritis (Reactive Arthritis)
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rectal polyps (colorectal polyps, colon polyps)
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rectal procidentia (rectal prolapse, prolapse of the rectum)
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rectal prolapse (rectal procidentia, prolapse of the rectum)
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rectocele (rectal procidentia, prolapse of the rectum)
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recurrent UTI (recurring urinary tract infection, chronic urinary tract infection, chronic UTI, relapsing urinary tract infection, relapsing UTI, chronic cystitis)
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recurrent otitis media (chronic otitis media, persistent otitis media, glue ear)
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recurring urinary tract infection (chronic urinary tract infection, recurrent UTI, chronic UTI, relapsing urinary tract infection, relapsing UTI, chronic cystitis)
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red measles (measles, rubeola, morbilli)
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reflux esophagitis (gastroesophageal reflux disease, GERD, heartburn)
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regional enteritis (Crohn's disease)
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relapsing UTI (recurring urinary tract infection, chronic urinary tract infection, recurrent UTI, chronic UTI, relapsing urinary tract infection, chronic cystitis)
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relapsing urinary tract infection (recurring urinary tract infection, chronic urinary tract infection, recurrent UTI, chronic UTI, relapsing UTI, chronic cystitis)
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renal artery aneurysm (atheroembolic renal disease, atherosclerotic renal vascular disease, renal artery embolism, cholesterol embolism)
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renal artery embolism (atheroembolic renal disease, atherosclerotic renal vascular disease, cholesterol embolism, renal artery aneurysm)
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renal failure (acute renal insufficiency)
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renovascular hypertension (acute renal insufficiency)
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respiratory acidosis (hypercapnia)
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respiratory alkalosis (hyperventilation-induced alkalosis)
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respiratory distress syndrome in newborns (RDS)
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respiratory syncytial virus infection (RSV infection)
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restless leg syndrome (nocturnal myoclonus, akathisia)
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restrictive cardiomyopathy (restrictive myocardiopathy)
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restrictive myocardiopathy (restrictive cardiomyopathy)
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retinal detachment (restrictive cardiomyopathy)
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retrograde ejaculation (restrictive cardiomyopathy)
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reversible ischemic neurologic disease (RIND) (transient ischemic attack, TIA, ministroke)
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rheumatic chorea (Sydenham's chorea, St. Vitus dance, chorea minor)
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rheumatic fever (Sydenham's chorea, St. Vitus dance, chorea minor)
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rheumatoid arthritis (RA)
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rickettsialpox (RA)
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ringing in the ears (tinnitus)
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rosacea (acne rosacea)
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roseola (exanthema subitum, pseudorubella)
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roundback (kyphosis, humpback, hunchback, Scheuermann's disease, dowager's hump, Pott's curvature)
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roundworm infection (ascariasis)
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roundworm infestation (pinworm infestation)
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rubella (German measles, three-day measles)
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rubeola (measles)
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runner's knee (chondromalacia patellae (CMP))
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runner's toe (toenail conditions, ingrown toenail, abnormal nails, black toe, toenail infection)
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ruptured disk (slipped disk, herniated disk)
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ruptured eardrum (slipped disk, herniated disk)
