MRI Findings of Mucinous Adenocarcinoma Arising From Perianal Fistula: Report of Two Cases

Nuray Haliloglu

doi:10.12996/gmj.2013.25

Abstract

Mucinous adenocarcinoma may develop on the chronic setting of a perianal fistula. Magnetic resonance imaging (MRI) is the choice of imaging technique for the diagnosis of mucinous adenocarcinoma arising from perianal fistula. T2-weighted, and contrast enhanced MR images may provide important diagnostic information. In this report, we present MRI findings of two cases with mucinous adenocarcinoma arising from chronic perianal fistula with a brief review of the literature.

Highlights

Mucinous adenocarcinoma arising from perianal fistula is rare, and the diagnosis is difficult
We present Magnetic resonance imaging (MRI) findings of two cases with mucinous adenocarcinoma arising from chronic perianal fistula with a brief review of the literature
Malignant transformation has to be ruled out in every patient presenting with chronic perianal fistula

Summary

Introduction

Mucinous adenocarcinoma arising from perianal fistula is rare, and the diagnosis is difficult. Patients with perianal fistula usually present with purulent discharge and pain (4). There are no specific symptoms for mucinous adenocarcinoma complicating a chronic perianal fistula (5).The past medical histories of these patients may mislead the physicians, and cause a delay in diagnosis (6). Magnetic resonance imaging (MRI) is the most accurate technique for the preoperative diagnosis, and classification of a perianal fistula (7).

Results

Conclusion