Low Donor Site Morbidity Supports the Use of Infraumbilical Flaps for Head and Neck Reconstruction: A Retrospective Cohort Study

Background: Currently, the standard design of the skin component of abdominal soft-tissue flaps recommended for head and neck reconstruction encompasses the upper and lower periumbilical region to include the maximum number of myocutaneous perforators. Yet, this flap design precludes the harvest of bilateral flaps and the use of the contralateral area in case of flap failure. Aim: We aimed at proving the long-term safety of infraumbilical abdominal free flaps in terms of abdominal wall integrity.  Methods: Consecutive subjects who underwent reconstruction of composite cervico-facial defects with infraumbilical free flaps between 2008 - 2020 were enrolled. After surgery, patients were followed up at three-month intervals to evaluate the incidence of any complications at the donor site.  Results: 25 patients underwent reconstruction with free flaps from the lower abdomen. A total of 35 abdominal flaps were performed; ten patients underwent bilateral flap harvest. Marginal abdominal skin necrosis occurred in 3 patients. Abdominal bulge occurred in one case; neither hernia nor abdominal wall weakness was encountered at a median follow-up of 12 months. Conclusions: The infraumbilical region is a safe donor area of free flaps for head and neck reconstruction that preserves abdominal wall firmness and provides a satisfactory cosmetic result at the donor site.