Three-layer reconstruction with fascia lata and vascularized pericranium for anterior skull base defects.

BACKGROUND

We report an assessment of the efficiacy of a triple layer graft composed of fascia lata and vascularized pericranium for anterior skull base reconstruction. This technique is based on the concept that vascularized tissue over a free flap may promote vascularization and rapid wound healing.

METHOD

A large fascial graft is prepared from the fascia lata and divided in two pieces and trimmed to a size larger than the bone and dural defect. Vascularized pericranium is harvested after bicoronal incision and elevating the bifrontal scalp flap down to the supraorbital rims. First is dural repair, which is performed with fascia lata placed between the brain and remaining dura. Second, fascia lata is placed over the skull base defect and secured with mini titanium screws over the cranial surface of the orbital ridges. Third, vascularized pericranium is laid between the two layers of fascia lata.

FINDINGS

We studied 17 patients of whom 2 had malignancy, 6 had olfactory groove meningioma, 6 had skull base fracture and rhinorrhea, 1 case had orbital meningioma, 1 had invasive pituitary adenoma and 1 had basal encephalocele. The transbasal approach was used as a single procedure in 13 cases. The extended transbasal approach combined with a transfacial approach was used in 3 cases and with a pterional approach in 1 case. In each patient, reconstruction of the cranial base was performed with triple layer graft of fascia lata and vascularized pericranium. The patients were followed-up 2 months to 5 years. None of the patients experienced postoperative cerebrospinal fluid leakage, meningitis, abscess, brain herniation and tension pneumocephalus.

INTERPRETATION

Fascia lata with vascularized pericranium is highly reliable, tensile and well suited for reconstruction of the anterior skull base.