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软组织肉瘤是一种少见的恶性肿瘤,占全部恶性肿瘤的0.6％,原发于四肢者占55％左右,平均发病年龄45岁,横纹肌肉瘤多见于儿童。 软组织肉瘤为来源于间叶组织的骨外结缔组织的恶性肿瘤,它虽有不同的组织学类型,但其临床表现、自然病程和治疗方法等相似,故常在一起讨论。各型按分化程度分为三级:Ⅰ级(G_1)分化较好者,Ⅱ级(G_2)分化居中者,Ⅲ级(G_3)分化差者。
Soft tissue sarcoma is a rare malignant tumor, which accounts for 0.6% of all malignant tumors. It accounts for about 55% of primary limbs. The average age of onset is 45 years old. Rhabdomyosarcoma is more common in children. Soft tissue sarcoma is a malignant tumor of extraosseous connective tissue originating from the mesenchymal tissue. Although it has different histological types, its clinical manifestations, natural course, and treatment methods are similar, so they are often discussed together. All types were divided into three grades according to the degree of differentiation: Grade I (G_1) differentiated better, Grade II (G_2) differentiated among the middle, and Grade III (G_3) poorly differentiated.