Vanderbilt engineers have developed a robotic system for performing sinus and neurosurgery through the nose. This provides a less invasive way to access surgical sites in the sinuses and near the middle of the patient's head, leading to faster recovery times. The robot is modular and sterilizable with detachable cartridge-based instruments. Each instrument is a concentric tube robot, which is a needle-sized tool that can bend and elongate. The system delivers four of these instruments through a single nostril.