Fig. 15From: MRI and CT of anal carcinoma: a pictorial reviewA 40-year-old male patient with long-standing perianal Crohn’s disease, being treated with seton. Contrast-enhanced MDCT images (a, b, c in cranio-caudal order) show right-sided levator ani abscess (*), extensive perianal fistulisation occupying the ischioanal space (arrow), and marked solid-appearing circumferential anorectal thickening (arrowheads). Abdomino-perineal resection for SCAC was performedBack to article page