目的探讨胸膜外孤立性纤维瘤 的CT表现，进一步提高对本病的认识。方法回顾性分析6例经手术病理证实的胸膜 外孤立性纤维瘤的CT表现。结果 6例胸膜 外孤立性纤维瘤中，发生在腹部5例，1例 发生于盆腔。CT平扫表现为边界清晰的不 均匀略低密度软组织肿块，可见索条状及 斑片状更低密度区，未见明确钙化征。增 强扫描肿瘤均显著不均匀强化，肿瘤内更 低密度区无强化，强化形式呈“快进慢 出”。1例肿瘤内及周围见增粗、迂曲血 管。结论 胸膜外孤立性纤维瘤的CT表现 具有一定的特征性，动态增强扫描可提高 诊断准确性，但最后确诊仍需结合病理学 及免疫组化检查。

Objective To explore the CT findings of extrapleural solitary fibrous tumor(ESFT) and improve the further recognition. Methods The CT findings of 6 cases with extrapleural solitary fibrous tumor(ESFT) confirmed by operation were retrospectively analyzed. Results In the 6 cases of extrapleural solitary fibrous tumor, 5 cases located in the abdomen and 1 in the pelvic cavity. CT scan showed soft tissue mass with clear boundary and uneven slightly low density. Strip and patchy lower density area could be seen and no clear calcification. All the tumors showed significantly uneven enhancement with the form of "wash in wash out". and the lower density area had no enhancement. One of the cases could see thick and circuitous vessels in and around it. Conclusions The CT findings of extrapleural solitary fibrous tumor have certain characteristic. Dynamic enhanced scan can improve the diagnostic accuracy, but the final diagnosis still depends on pathology and immunohistochemistry examination.