Epithelialization of Free Flap Vascular Pedicles through the Nasal Cavity after Long-term Follow-up: A Case Report.

A 59-year-old man with right maxillary cancer presented with a right buccal fistula and an ectropion of the lower eyelid after multidisciplinary treatment. With no suitable vessels in the right face or neck for anastomosis, we planned reconstruction with a free thinned deep inferior epigastric artery perforator flap using the contralateral left facial artery and vein as the recipient. To simulate the length of the vascular pedicle, we used our original software and determined to use the route passing through the nasal cavity. The vascular pedicle was passed through a tunnel from the medial wall of the right maxillary sinus, through the nasal septum and the medial-frontal wall of the left maxillary sinus, to the left facial artery and vein. The flap survived completely, and facial deformity was corrected. At 1 year postoperatively, there had been concerns about the fragility of the vascular pedicle in the nasal cavity and the possibility of easy bleeding. Endoscopic examination revealed that the vascular pedicle in the nasal cavity was covered by fibrous tissue and multirow lineage epithelium, and an excisional biopsy indicated a low possibility of hemorrhage. Cutting off the vascular pedicle to prevent bleeding may not be necessary because the vascular pedicle through the nasal cavity becomes fibrotic and epithelialized in the surrounding area in the long term.