LAUSR

Cap-assisted colonoscopy involves the attachment of a distal transparent cap to the end of the colonoscope. This method has several advantages, such as decreasing insertion time [1] and enabling easy flattening of the mucosal folds, thus permitting visualization of the hidden polyps behind the mucosal folds [2]. However, the use of cap-assisted colonoscopy in detecting adenomas is debatable [1, 3]. Until now, although the benefits of using a clear cap have been discussed, there have been no discussions on how to use it. Therefore, this study suggests a “hooking and dragging maneuver” (▶Video 1). This maneuver involves hooking the mucosal fold with the tip of the cap, dragging the scope, scratching along the colon wall, and stretchingmultiplemucosal folds simultaneously (▶Fig. 1). This technique allows the visualization of multiple posterior regions of the mucosal fold at the same time,minimizing the hidden areas. Hooking points and dragging directions on the cecum (▶Fig. 2), the ascending colon (▶Fig. 3), and the hepatic flexure (▶Fig. 4) are shown.