Use of Anterolateral Thigh and Lateral Arm Fasciocutaneous Free Flaps in Lateral Skull Base Reconstruction

Abstract

Lateral skull base defects following tumor ablation are ideally reconstructed with microvascular free tissue transfer. Although the rectus abdominis free flap is the workhorse in skull base reconstruction, it has a number of drawbacks. Anecdotal reports have indicated that fasciocutaneous free flaps may be useful alternatives in selected cases. Patients undergoing lateral arm (4 cases) or anterolateral thigh (8 cases) fasciocutaneous free flap reconstruction of lateral skull base defects between 1999 and 2005 were therefore reviewed. Twelve consecutive patients (4 males, 8 females) with a mean age of 63 years (range, 39 to 74) underwent such reconstruction following resection of lateral (11 cases) and anterolateral (1 case) skull base lesions. Eight patients had squamous cell carcinoma, 3 had infection or osteoradionecrosis, and 1 had adenoid cystic carcinoma. The duration of surgery (from induction of anesthesia to exit from the operating room) averaged 14.5 hours (range, 10 to 19.5 hours). All donor sites were closed directly. All the flap transfers were successful, with minimal reconstructive and donor site morbidity. During the follow-up period (average, 18 months; range, 2-48 months), 2 patients died of metastatic disease, and another 2 died of other unrelated causes. The remaining 8 patients are alive and disease free. It is concluded that lateral arm and anterolateral thigh fasciocutaneous free flaps should be considered as viable reconstructive options for lateral skull base ablative defects.