title: Idiopathic retroperitoneal fibrosis in twins.
abstract: We report idiopathic retroperitoneal fibrosis in nonidentical twins. The blood group in both patients was O, Rh(D) positive.
mesh_terms: D004200:Diseases in Twins; D006801:Humans; D008297:Male; D008875:Middle Aged; D012185:Retroperitoneal Fibrosis / Q000175:diagnosis / Q000235:genetics*