去分化脂肪肉瘤的去分化成分显示了广泛组织学变异,包含异质性分化的肿瘤。在去分化脂肪肉瘤中肌纤维母细胞分化已得到公认。然而,酷似炎症性肌纤维母细胞肿瘤的去分化脂肪肉瘤尚未被认可。本作者报道了6例具有炎性肌纤维母细胞瘤样特征的去分化脂肪肉瘤的临床病理、免疫组织化学和分子水平的发现。此肿瘤主要发生在中老年人,主要累及腹股沟 Dedifferentiation components of dedifferentiated liposarcomas show extensive histological variations that include heterogeneous differentiated tumors. Differentiation of liposarcoma in myofibroblast differentiation has been recognized. However, dedifferentiated liposarcomas resembling inflammatory myofibroblastic tumors have not been approved. The authors report the clinicopathological, immunohistochemical and molecular findings of six dedifferentiated liposarcomas with inflammatory myofibroblastic tumor-like features. This tumor occurs mainly in the elderly, mainly involving the groin