Fibrosarcoma.
D000009:Abdominal Muscles / Q000473:pathology*; D000368:Aged; D001344:Autopsy; D005350:Fibroma / Q000473:pathology; D005354:Fibrosarcoma / Q000473:pathology*; D006801:Humans; D008297:Male; D009236:Myxosarcoma / Q000473:pathology; D009362:Neoplasm Metastasis; D009364:Neoplasm Recurrence, Local / Q000601:surgery; D009455:Neurofibroma / Q000473:pathology; D012186:Retroperitoneal Neoplasms / Q000601:surgery; D013997:Time Factors