肠系膜脂膜炎的CT及MRI诊断

摘要

Objective:To investigate the diagnostic value of CT and MRI of mesenteric panniculitis to improve the level of di-agnosis. Methods:To retrospective review CT and MRI findings in 21 cases of mesenteric panniculitis,analyze the CT and MRI features,and combined with clinical diagnosis. Results:21 patients with mesenteric panniculitis arose from the mesenteric root, wrapped around the root of mesentery vessel,grew on both sides of the abdomen by mesenteric root,mainly to the left side,5 lesions realm unclear,the rest state was clearer. Lesions on CT usually showed heterogeneous fat density,the CT value-54 HU~-26 HU,with clear boundary and lesions showed fatty mass boundary less clear with lesions were frosted glass like change,higher than the surrounding normal fat density,and no obvious enhancement at enhanced scan. On fat-suppression T2 MRI sequence,the lesion signal was higher than the normal fat signal around. Among them,14 cases were seen "false capsule"sign,9 cases showed "fat ring" sign. Conclusion:Certain features of the CT and MRI manifestations of mesenteric panniculitis can be found,CT and MRI is effective for the diagnosis of mesenteric panniculitis.%目的:探讨CT及MRI对肠系膜脂膜炎(MP)的诊断价值,提高诊断水平.方法:回顾性分析21例MP的CT及MRI表现,分析其CT及MRI特点,并结合临床综合诊断.其中14例行MSCT腹部平扫及双期增强扫描,7例行MRI平扫及动态增强扫描.结果:21例均起自肠系膜根部,包绕肠系膜根部大血管,由肠系膜根部向两侧腹部生长,以向左侧多见,5例病灶境界欠清,其余境界较清晰,CT平扫病灶呈不均匀脂肪密度,CT值-54~-26 HU,境界较清者病灶呈脂肪性肿块,欠清者病灶呈磨玻璃样改变,较周围正常脂肪密度增高,增强扫描病灶强化不明显.MRI上T2压脂序列病灶信号较周围正常脂肪信号高.14例可见假包膜征,9例可见脂肪环征.结论:MP的CT及MRI表现具有一定特征,CT及MRI是诊断该病的有效影像手段.