Fig. 19a, b
From: A primer to common major gastrointestinal post-surgical anatomy on CT—a pictorial review
Abdomino-perineal resection. Axial contrast-enhanced CT images of a 78-year-old woman with abdomino-perineal resection for cancer of the lower rectum located 2.5 cm from the anal border. Note the absence of rectum in the pre-coccygeal space in (a). The anus, anal sphincters and levator ani muscles were all resected and patient had a permanent end colostomy in left iliac fossa (white arrow)