title: Massive intraabdominal bleeding due to a retroperitoneal leiomyosarcoma.
abstract: Retroperitoneal leiomyosarcomas are rare and show a tendency toward large size, cystic degeneration, bleeding, and extensions by infiltration to the adjacent structures. An unusual case of a retroperitoneal cystic leiomyosarcoma with massive intraabdominal bleeding is presented.
mesh_terms: D006465:Hemoperitoneum / Q000209:etiology*; D006801:Humans; D007890:Leiomyosarcoma / Q000150:complications* / Q000473:pathology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000150:complications* / Q000473:pathology / Q000601:surgery; D012422:Rupture, Spontaneous