图示：脂肪肉瘤。多发生于腹膜后和股部，好发于中老年人。
呈淡黄*色、分化相对较成熟，虽然没有疼痛，但切除后往往容易复发。
This large mass lesion is a liposarcoma. Common sites are the retroperitoneum and thigh, and they occur in middle aged to older adults. This one is yellowish, like adipose tissue, and is well-differentiated. Though indolent, it continues growing to reach a large size, and following excision, it has a tendency to recur.