retroperitoneal sarcoma

A nonspecific term for any sarcoma arising in the retroperitoneal region, which comprises 15% of all sarcomas (of 8,600 cases/year, USA).

Clinical findings
Often asymptomatic abdominal mass; average age, 50.
Prognosis
65% to 80% of cases achieve complete resection; 5-year local recurrence, ±50%; 5-year survival, ±50%.
Histological types of retroperitoneal sarcoma
• Liposarcoma—41%;
• Leiomyosarcoma—28%;
• Malignant fibrous histiocytoma (MFH)—7%;
• Fibrosarcoma—6% (MFH and fibrosarcoma are now viewed as synonyms);
• Malignant peripheral nerve sheath tumour—3%.

单词	retroperitoneal sarcoma
释义	retroperitoneal sarcoma retroperitoneal sarcoma A nonspecific term for any sarcoma arising in the retroperitoneal region, which comprises 15% of all sarcomas (of 8,600 cases/year, USA). Clinical findings Often asymptomatic abdominal mass; average age, 50. Prognosis 65% to 80% of cases achieve complete resection; 5-year local recurrence, ±50%; 5-year survival, ±50%. Histological types of retroperitoneal sarcoma • Liposarcoma—41%; • Leiomyosarcoma—28%; • Malignant fibrous histiocytoma (MFH)—7%; • Fibrosarcoma—6% (MFH and fibrosarcoma are now viewed as synonyms); • Malignant peripheral nerve sheath tumour—3%.
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