Reconstruction of the anterior skull base with radial forearm free tissue transfer: case series and literature review

Abstract

Aim: Reconstruction of the anterior skull base offers an especially complex challenge as the impermeable separation of the dural space and the upper aerodigestive tract must be maintained. We propose the use of the radial forearm free flaps (RFFF) as a superb method of re-establishing integrity in anterior skull base defects. Methods: Literature review and retrospective analysis of 4 single-institution cases of anterior skull base defects reconstructed with a RFFF. Data were collected on successful and unsuccessful defect repairs, complication rates, and length of hospitalization. Results: The indications for surgery were pneumocephalus, recurrent brain abscesses, recurrent frontal sinus mucoceles, and cerebrospinal fluid leak. Of the 4 cases, 1 was complicated by a small dehiscence of the craniotomy site, 1 developed infection, and 2 required further surgery. Conclusion: The use of RFFF is an excellent option for reconstruction of defects in the anterior skull base, especially those complicated by radiation, prior surgery, or infections. Patients with skull base defects are inherently at high risk for post-surgical complications. The RFFF transfers healthy, viable, well-vascularized tissue to prevent further infections and provides a reliable barrier between the dural and sinonasal spaces. This can reduce the need for repeat neurosurgical operations and hospitalizations.