A surgical device for use with an endoscope. The device includes an end cap removably affixable to a distal end of the endoscope such that at least a portion of the end cap distally extends beyond the distal end of the endoscope. The end cap defines a through bore for receiving the distal end of the endoscope, and the end cap includes an outer surface defining first and second tracks substantially perpendicular to a longitudinal axis of the through bore. The device further includes a first working channel having a distal end disposed in the first track and movable along a length of the first track between a first position and a second position. The device further includes a second working channel having a distal end disposed in the second track and movable along a length of the second track between a first position and a second position. The distal end of each the first and second working channel defines a bore having a longitudinal axis substantially perpendicular to the longitudinal axis of the through bore of the end cap.
