Ileocolic anastomosis. An ileocolic anastomosis is an anastomosis between the ileum and the colon (e.g., after a right hemicolectomy). This is generally an end-to-end (Fig. 7.2) or end-to-side anastomosis (Fig. 7.3). One can usually see a slight difference between the velvety, small intestinal mucosa and the smooth, shiny colonic mucosa. The transition is usually visible as a clear, smooth border and is only seldom slightly polypoid in appearance (Figs. 7.2, 7.3).

Colocolic anastomosis. A colocolic anastomosis is constructed between two colon segments (e.g., following resection of the sigmoid colon) and is usually an end-to-end anastomosis. A normal colocolic anastomosis appears as a smooth, whitish curvilinear scar that does not noticeably narrow the lumen (Fig. 7.4). Sometimes larger venous vessels can be seen near the anastomosis, but not intersecting it; occasionally suture remnants or metal staples (from the use of automatic sutures) can be seen on the anastomosis (Fig. 7.5).