MR Imaging Evaluation of Perianal Fistulas: Spectrum of Imaging Features
2012; Radiological Society of North America; Volume: 32; Issue: 1 Linguagem: Inglês
10.1148/rg.321115040
ISSN1527-1323
AutoresJ. de Miguel Criado, Laura García del Salto, Patricia Fraga Rivas, Luis Felipe Aguilera del Hoyo, Leticia Gutiérrez Velasco, M. I. Díez Pérez de las Vacas, Ana Gloria Marco Sanz, Marcos Manzano Paradela, Eduardo Fraile Moreno,
Tópico(s)Pelvic and Acetabular Injuries
ResumoPerianal fistulization is an inflammatory condition that affects the region around the anal canal, causing significant morbidity and often requiring repeated surgical treatments due to its high tendency to recur. To adopt the best surgical strategy and avoid recurrences, it is necessary to obtain precise radiologic information about the location of the fistulous track and the affected pelvic structures. Until recently, imaging techniques played a limited role in evaluation of perianal fistulas. However, magnetic resonance (MR) imaging now provides more precise information on the anatomy of the anal canal, the anal sphincter complex, and the relationships of the fistula to the pelvic floor structures and the plane of the levator ani muscle. MR imaging allows precise definition of the fistulous track and identification of secondary fistulas or abscesses. It provides accurate information for appropriate surgical treatment, decreasing the incidence of recurrence and allowing side effects such as fecal incontinence to be avoided. Radiologists should be familiar with the anatomic and pathologic findings of perianal fistulas and classify them using the St James's University Hospital MR imaging–based grading system. © RSNA, 2012
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