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An appendicocutaneous fistula is a rare complication of appendectomy [1]. Moreover, the fistula can persist [2]. A 52-year-old man presented to our department with a 3-month history of purulent abdominal wall sinus that developed after appendectomy 3 months ago. Abdominal wall radiography revealed an abdominal wall fistula connecting with the ileocecal region (▶Fig.1). Under colonoscopy, we identified the swollen and purulent appendix stump with black stitching residue (▶Video 1). After repeated washing of the appendix stump (▶Video 1), milky pus remained around the stitching residue (▶Fig. 2). Using grasping forceps, we easily removed the stitching residue (▶Video 1). Saline solution with methylene blue was injected from the ostium of the abdominal wall fistula, and the inlet of the fistula was detected at the appendix stump (▶Fig. 3). Normal saline was then injected repeatedly from the abdominal outlet of the sinus to wash the fistula (▶Video 1). After washing, we released a nylon ring into the ileocecal region (▶Video 1). Eight clips were used to fasten the nylon ring around the inlet of the fistula at the appendix stump (▶Video 1). We then E-Videos

Successful endoscopic treatment of an appendicocutaneous fistula using endoloops