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目的探讨肾透明细胞肉瘤(CCSK)的CT与MRI表现特点。方法回顾性分析7例手术病理证实的CCSK患者(男3例,女4例,年龄11个月~7岁,平均3.8岁)的影像学资料,其中5例CT检查,2例MRI检查,均完成增强扫描。结果肿瘤均为单发,均位于肾髓质内,瘤体最大径2~15.8 cm;所有肿瘤内均有不同程度的液化坏死,其密度/信号强度不均匀,2例CT上见点状钙化,3例CT上见瘤体内明显肿瘤血管;2例MRI扩散成像显示病灶呈高信号。所有病灶增强扫描后呈不均匀中等度强化,全部病例均见远处转移:腹膜后淋巴结转移(4例),骨转移(3例)和肺转移(3例)。结论肾透明细胞肉瘤有一定影像学特点,通常瘤体大,密度/信号不均,不均匀的中等度强化,可有钙化,CT增强容易显示瘤内肿瘤血管,磁共振扩散成像呈高信号,远处转移早。
Objective To investigate the CT and MRI features of renal clear cell sarcoma (CCSK). Methods The imaging data of 7 patients with CCSK confirmed by surgery and pathology (3 males and 4 females, aged 11 months to 7 years, mean 3.8 years) were retrospectively analyzed. Among them, 5 cases of CT and 2 cases of MRI were examined Complete the enhanced scan. Results The tumors were all single, all located in the medullary, with the largest diameter of 2 ~ 15.8 cm. All the tumors had liquefaction necrosis in varying degrees, and the density / signal intensity was not uniform. Two cases of CT showed punctate calcification , Three cases of tumor on the tumor showed obvious tumor; 2 cases of MRI diffusion imaging showed high signal lesions. All lesions were non-uniformly moderately enhanced after enhanced scan. All cases were distant metastasis: retroperitoneal lymph node metastasis (4 cases), bone metastasis (3 cases) and lung metastasis (3 cases). Conclusions Renal clear cell sarcoma has some imaging features, usually large tumor volume, uneven density / signal, uneven moderate enhancement, calcification, enhanced CT display of tumor vessels in tumor easily, high diffusion MR imaging, Far away metastasis.