Retrorectal tumors in adults:Magnetic resonance imaging findings
Retrorectal tumors in adults:Magnetic resonance imaging findings作者机构：Department of Radiology The Affiliated Hospital of Nanjing University of Chinese Medicine No.155 Hanzhong Road Nanjing 210029 China.
出 版 物：《World Journal of Gastroenterology》 (世界胃肠病学杂志（英文版）)
年 卷 期：2010年第16卷第46期
页 面：5822-5829页
核心收录：
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Retrorectal tumor Presacral lesions Magnetic resonance imaging Congenital cyst Malignant tumor Diagnosis
摘 要：AIM:To retrospectively evaluate the magnetic resonance imaging (MRI) features of adult retrorectal tumors and compare with histopathologic ***:MRI features of 21 patients with preoperative suspicion of retrorectal tumors were analyzed based on the histopathological and clinical ***:Fourteen benign cystic lesions appeared hypointense on T1-weighted images,and hyperintense on T2-weighted images with regular peripheral *** or dermoid cysts were unilocular,and tailgut cysts were *** of intracystic intermediate signal intensity was observed in one case of tailgut cyst with a component of *** solid tumors were malignant lesions and showed heterogeneous intensity on *** adenocarcinomas showed high signal intensity on T2-weighted and mesh-like enhancing areas on fat-suppressed T2-weighted *** was a fistula between the mass and anus with an internal opening in mucinous adenocarcinomas arising from anal *** stromal tumors displayed low signal intensity on T1-weighted images,and intermediate to high signal intensity on T2-weighted *** necrosis could be seen as a high signal on T2-weighted ***:MRI is a helpful technique to define the extent of the retrorectal tumor and its relationship to the surrounding structures,and also to demonstrate possible complications so as to choose the best surgical approach.
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