目的 探讨膀胱非上皮性肿瘤的 CT表现特点。方法 回顾性分析经病理证 实的8例膀胱非上皮性肿瘤的CT表现，结 合文献分析膀胱非上皮性肿瘤的CT表现特 征。结果 平滑肌瘤3例，平扫表现为密 度均匀的类圆形软组织肿块，边界清，增 强扫描轻-中度强化。炎性肌纤维母细胞1 例，平扫呈不均匀等、低密度影，内见坏 死、分隔，边界欠清，增强扫描不均匀延 迟性强化，邻近膀胱壁增厚、强化。副神 经节细胞瘤2例，平扫表现为密度均匀的 等或稍低密度影，边界清，增强扫描明显 强化，1例内见强化血管影。神经内分泌 癌2例，其中 1例类癌表现为密度均匀的 软组织肿块，边界清，以蒂状结构与膀胱 壁相连，局部见斑点状钙化，增强扫描明 显强化。另1例小细胞神经内分泌癌呈分 叶状，密度不均匀，边界不清，增强扫描 不均匀强化，累及邻近膀胱壁及周围脂肪 间隙。结论 膀胱非上皮性肿瘤的CT表现 有一定的特征性，结合临床资料及影像学 表现可以提高诊断准确率，但确诊仍依赖 于病理学检查。

Objective To describe the CT imaging features in non-epithelial tissue tumor of bladder. Methods CT Findings of 8 cases with pathology proved non-epithelial tissue of the bladder were retrospectively analyzed and literatures were reviewed. Results Leiomyomas (3 cases). They were oval soft tissue masses with homogeneous density and clear boundary on plain CT scan. They showed mild to moderate homogeneous enhancement after contrast administration. Inflammatory myofibroblastic tumor (1 case). On Plain CT, It was heterogeneous hypo-/iso-density with necrosis and blurred boundary. Enhancement manifestations in dynamic contrast scan showed heterogeneous and delayed enhancement, with the adjacent wall of bladder was involved. Paragangliomas(2 cases). They had homogeneous hypo-/iso-density, defined boundary and obvious enhancement with enhanced blood vessels in one of the tumor. Neuroendocrine carcinomas (2 cases) . Carcinoid, one of the cases, showed homogeneous and defined boundary soft tissue mass which was connect the wall of bladder with a pedicel-like structure and stippled calcification. Obvious enhancement after contrast administration could be assessed. Another case was small cell neuroendocrine carcinoma. It showed lobulated, heterogeneous and ill-defined mass. There was heterogeneous enhancement after contrast administration, accompanied with the adjacent wall of bladder and adipose tissue involved. Conclusion There were some CT characteristics about the non-epithelial tissue tumor of bladders. Improvement of diagnostic accuracy could be obtained as clinical data and imaging findings. However, the final diagnosis still relies on pathology.