Sino-orbital cutaneous fistulas (SOCFs) are a rare and challenging complication from conditions including granulomatosis with polyangiitis. SOCFs are difficult to manage due to poor vascular supply, compromised tissue, and systemic immunocompromise, which lead to a high rate of recurrence. Given the overall rarity of SOCFs, optimal surgical repair remains controversial, with options ranging from conservative management, onlay grafts, and vascularized flaps. This case report describes a novel one-step approach to SOCF closure using a composite chondral mucosal nasoseptal flap in a patient with a large left medial canthal SOCF that had recurred despite 2 prior attempts at closure including a vascularized paramedian forehead flap. Nasoseptal flaps may provide vascularized mucosal tissue to allow for greater success in closure over traditional, external flaps, and skin grafts.
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