[Retroperitoneal liposarcoma--review of the literature with a report of 2 cases].
D005260:Female; D006801:Humans; D008080:Liposarcoma / Q000453:epidemiology / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012186:Retroperitoneal Neoplasms / Q000453:epidemiology / Q000473:pathology*