Objective To discuss the CT manifestations of renal leiomyosarcoma. Methods 9 cases of renal leiomyosarcoma proved by pathology were analyzed retrospectively. Results CT imaging showed homogeneous hyperattenuation in two cases. Heterogeneous in density with necrosis inside was observed on the CT scan in six cases. After contrast medium administration heterogeneous enhancement with cystic and necrotic areas could be revealed in all cases on both CT scan. Conclusion Large renal mass with intra-tumor necrosis,cystic and hemorrhagic change is the characteristic manifestations of renal leiomyosarcoma. But differential diagnosis from renal carcinoma by CT clinical setting is difficult before surgery, and final diagnosis should depend on pathology examination.
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