目的探讨胸膜外孤立性纤维瘤 的影像学表现。方法 回顾性分析8例经手 术病理证实的胸膜外孤立性纤维瘤的CT 和MR表现。结果 发生于颅内3例、腹部4 例、四肢软组织1例。CT均呈密度均匀或 不均匀的类圆形、分叶状较高密度的软组 织块影，CT值约40.0Hu。MR表现为，T1低 或等信号，T2高或低信号。增强后肿瘤实 质区明显强化。结论 胸膜外孤立性纤维 瘤广泛分布，CT呈较高密度软组织影、病 灶内T2低信

Objective To report Imaging Findings of extrapleural solitary fibrous tumor. Methods CT and MR findings in 8 patients winl pathologically proved extrapleural solitary fibrous tumor were analyzed retrospectively. Results The tumor was found in head in 3 cases, 4 cases in abdomen, 1 cases in soft tissues of extremities.CT showed similar round or lobulated soft masses. MR demonstrated hypo- or equal signal on T1WI, hyper- or low signal on T2WI. Marked enhancement of solid components in the solid parts was showed post-enhancement. Conclusion Extrapleural solitary fibrous tumors distribute widespread, low signal on T2WI and marked enhancement are the special features.