title: [Pleomorphic cell sarcoma responsible for a picture of retroperitoneal fibrosis].
abstract: A 68 years-old patient was followed-up during five years for idiopathic retroperitoneal fibrosis. The diagnosis was based on repeated examinations with two laparotomies as well as numerous biopsies. At autopsy a primary retroperitoneal sarcoma was found. This case points out the difficulty to differentiate idiopathic from malignant retroperitoneal fibrosis. Only one similar case was published in the literature.
mesh_terms: D000368:Aged; D003951:Diagnostic Errors; D006801:Humans; D008297:Male; D012185:Retroperitoneal Fibrosis / Q000175:diagnosis*; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis* / Q000473:pathology; D012509:Sarcoma / Q000175:diagnosis* / Q000473:pathology
vernacular_title: Sarcome à cellules pléiomorphes responsable d'un tableau de fibrose rétropéritonéale.