An endoscope (1110) includes a handle (1120), an elongated body (1114) extending distally from the handle (1120) and defining a longitudinal axis, a light source (1150) disposed within the distal portion (1116) of the elongated body (1114) and configured to illuminate tissue, and a therapeutic unit (1160) disposed within the distal portion of the elongated body (1114) and configured to treat tissue.