| Abstract: |
Tumors arising from tissue of the primitive mesenchymal mesenchyme comprise a heterogeneous group of benign and malignant neoplasms. Peripheral neurogenic tumors which are of ectodermal origin are also included since their behavior is similar; they are treated like soft tissue tumors. Soft tissue sarcomas are more common than primary malignant bone tumors. Chondrosarcoma and Ewing's sarcoma frequently involve the bony pelvis. In addition, prior radiation therapy is associated with development of bone and soft tissue sarcomas, and some chronic inflammatory states such as Paget's disease and chronic osteomyelitis can result in the development of bone sarcomas. Liposarcoma is one of the most common pelvic sarcomas. Epithelioid sarcomas are a rare malignant mesenchymal neoplasm where the cell of origin is unknown. Formally known as malignant fibrous histiocytomas, undifferentiated pleomorphic sarcomas consist of tumor cells with diffuse pleomor-phism and no identifiable line of differentiation. © 2022 John Wiley & Sons Ltd. All rights reserved. |
