[Retroperitoneal liposarcoma].
D006801:Humans; D008080:Liposarcoma / Q000150:complications*; D008643:Mesentery; D008654:Mesothelioma / Q000209:etiology*; D009362:Neoplasm Metastasis / Q000473:pathology*; D009852:Omentum; D012186:Retroperitoneal Neoplasms / Q000150:complications*