A medical surgical device for coloproctological pathologies comprises a tubular body (2), provided with a first end (5), which can be inserted into the anal cavity, and a second end (6), opposite the first end (5) and connected to a handle (7) for maneuvering the tubular body (2) inside the anal cavity. A light source (8) for illuminating the inside of the tubular body (2) can be removably connected to the tubular body (2). Downstream of the light source (8) is located an entraining body (10) for entraining a portion of the light emitted by the light source (8) toward the inserting end (5). The entraining body (10) comprises a thickening (11) on the internal wall (3).
