A circular stapler is disclosed. The circular stapler includes a handleassembly, an elongate body, a cartridge assembly, a trocar, and a lightsource. The elongatebody extends from the handle assembly and defines a longitudinal axis. Thecartridgeassembly is disposed adjacent a distal end of the elongate body and includes apusherassembly. The pusher assembly is movable to cause staples to be ejected fromthe cartridgeassembly. The trocar is disposed in mechanical cooperation with the cartridgeassembly andis longitudinally advanceable to puncture tissue. The light source is disposedin mechanicalcooperation with the trocar, and is configured to project a light beamdistally of the trocar.