Rectal malacoplakia in renal transplantation: MR features.

Abstract

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.

• Authors: M F Bellin, M A Darchen, C Hoang, M O Bitker, S Ourhama, M Attal, J Grellet
• Journal: Journal of computer assisted tomography (J Comput Assist Tomogr) 1994 Nov-Dec Vol. 18 Issue 6 Pg. 975-8 ISSN: 0363-8715 [Print] United States
• PMID: 7962812 (Publication Type: Case Reports, Journal Article)

Chemical References

• Contrast Media
• Gadolinium

Topics

• Colonic Diseases (diagnosis, pathology)
• Contrast Media
• Diagnosis, Differential
• Gadolinium
• Humans
• Image Enhancement
• Intestinal Mucosa (pathology)
• Kidney Transplantation
• Magnetic Resonance Imaging
• Malacoplakia (diagnosis, diagnostic imaging, pathology)
• Male
• Middle Aged
• Rectal Diseases (diagnosis, diagnostic imaging, pathology)
• Tomography, X-Ray Computed