Practical Reviews

Most Tumors of the Retroperitoneum Are Malignant


Background: Retroperitoneal tumors are rare but usually malignant. Objective: To review retroperitoneal tumors. Mesodermal tumors: The most common retroperitoneal tumor is liposarcoma, a fat-containing mass that can be well differentiated, dedifferentiated, myxoid (with cystic-appearing components), or pleomorphic. Leiomyosarcoma is the second most common tumor, arises from smooth muscle, and is often large and necrotic. Malignant fibrous histiocytoma is the next most common and ca more...
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