硬化性肠系膜炎的CT诊断

CT findings of sclerosing mesenteritis

目的:探讨CT对硬化性肠系膜炎的诊断价值。方法:回顾性分析11例经病理证实的硬化性肠系膜炎的CT表现。结果:11例硬化性肠系膜炎均起自系膜根部,围绕系膜血管,肠系膜密度增高,平扫CT值为-45^-35 HU,明显高于腹膜后正常脂肪密度(-120^-100 HU),差异有统计学意义(P<0.01)。增强扫描动脉期、静脉期示肠系膜无明显强化。9例肠系膜周围有软组织肿块形成;8例病变内可见小结节、有明显强化;6例肠系膜血管周围有脂肪存在,形成脂肪环征(6/11),5例无此征象;肠系膜血管被软组织包绕;8例可见到假肿瘤包膜。结论:CT检查是诊断硬化性肠系膜炎非常有价值的影像手段。

Objective：To investigate the value of CT in the diagnosis of sclerosing mesenteritis （SM）. Methods：The CT manifestations of 11 patients with sclerosing mesenteritis were analyzed retrospectively. Results： All of the 11 patients with SM were with high density,originating from the mesenteric root and encapsulating the mesenteric blood vessels. The CT value of mesentery ranged from 45-- 35HU on plain CT and were higher than that of the retroperitoneal adipose tissue in the same patient （-120-- 100 H U） with significant statistical difference （P〈0.01）. No marked enhancement of mesentery were shown on the arterial phase and venous phase after contrast administration. Soft tissue mesenterie mass were revealed in 9 cases and markedly enhanced small nodules in 8 cases. ＂Fatty-halo sign＂ can be found in 6 cases,which were formed by mesenteric blood vessels surrounded by fatty tissue. 5 cases didn＇t have such ＂fatty halo sign＂, the mesen teric blood vessels were surrounded by soft tissue. Pseudo tumoral capsule could be found in 8 eases. Conclusion： CT is a very useful imaging modality for the diagnosis of sclerosing mesenteritis.