Usefulness of keystone island flap for circumferential defect around a urostomy

Free perforator flap, perforator propeller flap, and super microsurgery flap are newly used to cover skin defects in all parts of the body. However, these methods require complex surgical techniques, long operation times, and carry the risk of unstable flap circulation. Recently, the keystone island flap has been reported as increasingly being used to cover skin defects. The elevation of the keystone island flap is easier compared to other flaps, and flap circulation is very stable. It has been reported that the keystone flap was successfully used in surgeries of the head and neck, trunk, and extremities. Meanwhile, there are few reports about reconstructive methods used for the circumferential defect around abdominal stomas. In this report we describe a patient who had an abdominal circumferential skin defect surrounding a urostomy caused by tumor resection. The defect was successfully reconstructed using the keystone island flap method.