[Case report and discussion of problems of tumor originating at the retroperitoneum].
D001344:Autopsy; D006801:Humans; D007890:Leiomyosarcoma / Q000473:pathology / Q000601:surgery; D008297:Male; D008875:Middle Aged; D010534:Peritoneal Neoplasms / Q000473:pathology / Q000601:surgery; D012187:Retroperitoneal Space