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目的分析7例经病理证实的肺肉瘤样癌(PSC)的CT表现与临床资料,以提高对该病的认识。方法回顾性分析7例PSC的CT表现,所有病例均行CT平扫及增强扫描,分析病灶发生的部位、形态、强化形式与周围侵犯及转移等。结果 7例PSC均为单发,左肺4例,右肺3例;6例为周围型,1例为中央型。病灶平扫为软组织密度,其中6例密度不均匀,可见片状低密度坏死区;增强扫描5例呈厚环状强化,1例呈片絮状强化,1例病灶较小呈轻度均匀强化。所有病例免疫组织化学见CK(+)与Vim(+)。结论 PSC CT表现有一定的特点,周围型常表现为较大的肿块,易侵犯胸壁,增强扫描多呈厚环状强化,病灶常可见片状低密度坏死区,确诊需依靠病理学检查。
Objective To analyze the CT findings and clinical data of 7 pathologically confirmed pulmonary sarcomatoid carcinomas (PSC) to improve their understanding of the disease. Methods The CT findings of 7 PSCs were retrospectively analyzed. CT scan and enhanced scan were performed in all cases. The location, morphology, intensified form and surrounding invasion and metastasis of the lesions were analyzed. Results All the 7 PSCs were single, 4 in the left lung and 3 in the right lung, 6 in the peripheral type and 1 in the central type. Lesions were soft tissue density scan, of which 6 cases of uneven density, visible low-density lamellar necrosis area; enhanced scanning in 5 cases were thick ring-like enhancement, 1 was flaky floc, 1 lesion showed mild uniform enhancement . Immunohistochemistry in all cases of CK (+) and Vim (+). Conclusion PSC CT has certain characteristics. Peripheral type usually presents as large lumps, easily infiltrating the thoracic wall. The enhanced scan mostly shows thick ring - shaped enhancement. Lesions often show patchy low density necrosis area. The diagnosis depends on the pathological examination.