直肠管状绒毛状腺瘤的MRI表现

MRI findings of tubulovillous adenoma of rectum

目的:探讨直肠管状绒毛状腺瘤的MRI表现,提高认识。方法:回顾性分析14例经过病理证实的直肠管状绒毛状腺瘤的MRI表现。结果:14例直肠管状绒毛状腺瘤均为单发,其中8例为宽基底,4例为窄基底,2例为肠壁环形增厚。9例与肠壁间有通气间隙。平扫T1WI表现为12例呈稍低信号,2例呈等信号;T2WI表现为10例呈稍高信号,2例呈高信号,2例呈等信号。增强扫描14例均呈不均匀强化,其中8例呈"三环状"强化。DWI序列9例呈稍高信号,5呈高信号。结论:MRI在直肠管状绒毛状腺瘤的诊断中具有较高的价值,对术前手术方式的选择具有重要意义。

Objective To analyze MRI appearances for rectal tubulovillous adenoma and in hope to improve cognition.Methods MRI findings of 14 cases of rectum tubulovillous adenoma confirmed by pathology were retrospectively analyzed.Results All 14 cases were solitary,8 out of 14 tumors grew with wide base,4 tumors grew with narrow base,2 cases appeared as wall thickening.There was a venting gap between the tumor and the opposite wall in 9 cases.On Un-enhanced T1 WI,12 cases of rectal tubulovillous adenoma lesions were slightly hypo-intense,2 lesions were isointense;On T2 WI,10 lesions were slightly hyperintense,2 cases were hyperintense,2 lesions were isointense.After contrast administration,all lesions showed inhomogeneous enhancement,tricyclic reinforcement was seen in 8 cases.On DWI,9 cases showed slight high signal and 5 cases showed high signal intensity. Conclusion MRI has a high diagnostic value in rectal tubulovillous adenoma,there is a great significance of the selection of the surgery.