Rabies
Radiation Syndrome
Ramon Syndrome
Rapp-Hodgkins Syndrome
Rasmussen Encephalitis
Red Blood Cell Aplasia
Reflex Sympathetic Dystrophy Syndrome
Refsum Syndrome
Reiter Syndrome
Renal Calculi
Renal Cancer
Renal Cell Carcinoma
Renal Failure (Acute)
Renal Glycosuria
Renal Hypertension
Renal Osteodystrophy
Renal Rickets
Renal Tubular Acidosis
Rett Syndrome (International Forum)
Rett Syndrome (Canadian Forum)
Rheumatoid Arthritis
Rieger Syndrome
Riley-Day Syndrome
Roberts Syndrome
Robinow Syndrome
Romano-Ward Syndrome
Rosenberg-Chutorian Syndrome
Rothmund-Thomson syndrome
Rubinstein-Taybi Syndrome
Russel-Silver Syndrome
Ruvalcaba-Myhre-Smith Syndrome