Bellin M F, Darchen M A, Hoang C, Bitker M O, Ourhama S, Attal M, Grellet J
Department of Radiology, Hôpital Pitié Salpétrière, Paris, France.
J Comput Assist Tomogr. 1994 Nov-Dec;18(6):975-8. doi: 10.1097/00004728-199411000-00025.
This report describes the CT and MRI features of rectal malacoplakia in a renal transplant recipient. The lesion appeared strongly hyperdense (105 HU) on unenhanced CT and demonstrated hypointense signal on T1- and T2-weighted MR imaging with slight homogeneous enhancement after gadolinium injection. These characteristics distinguish this lesion from other more common neoplastic, inflammatory rectal lesions that are typically isointense on T1-weighted imaging and enhance variably after gadolinium injection. Characteristic intracytoplasmic siderocalcific spherules in malacoplakia can produce suggestive features on unenhanced CT and MRI.
本报告描述了一名肾移植受者直肠软斑病的CT和MRI特征。该病变在未增强CT上表现为明显高密度（105HU），在T1加权和T2加权磁共振成像上呈低信号，注射钆后有轻微均匀强化。这些特征将该病变与其他更常见的肿瘤性、炎症性直肠病变区分开来，后者在T1加权成像上通常为等信号，注射钆后强化程度各异。软斑病中特征性的胞浆内铁钙沉着小球可在未增强CT和MRI上产生提示性表现。
