LAUSR

We hereby present the successful application of submucosal tunneling cecetomy on a 12-kg female Beagle dog tomimic appendectomy in human. The steps were as follows (▶Fig. 1, ▶Video 1). Step 1: mucosal incision – the colonic cavity was intensively washed with normal saline to avoid leakage of fecal contents; the mucosa opposite the ileocecal valve was chosen for mucosal incision; a 2-cm horizontal or oblique mucosal incision was created. Step 2: submucosal tunneling – a submucosal tunnel was created until intentional perforation of the muscularis propria, about 3 cm from the appendix; the distance of 3 cm provided critical working space and better visualization of the appendix. Step 3: dissection E-Videos