O Antonyshyn. Mastoid skin island flap: A simple technique for conchal defect reconstruction. Can J Plast Surg 1993; 1(3): 137-140. Conchal defects resulting from tumour excision can pose a difficult reconstructive problem. These defects generally involve the entire concha and occasionally extend to the external auditory canal. Under these circumstances, skin graft reconstruction is unsuitable. A simple technique of conchal reconstruction using a mastoid skin island flap is described. The flap provides a reliable one-stage reconstruction of the concha and posterior conchal wall.