• Neurosurgery · Apr 2007

    Case Reports

    Symptomatic mass effect of a hypertrophied pericranial flap after repair of a dural defect: case report.

    • Khoi D Than, Ryan M Kretzer, Michael J Dorsi, and Jon D Weingart.
    • Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
    • Neurosurgery. 2007 Apr 1; 60 (4): E773; discussion E773.

    ObjectiveTo detail a potential complication of the use of vascularized pericranial flaps in the repair of dural defects, namely, flap hypertrophy secondary to venous engorgement.Clinical PresentationA 23-year-old man with a left parietal lobe hemangiopericytoma underwent a craniotomy for tumor resection. The resultant dural defect was repaired with a vascularized pericranial flap. On postoperative Day 3, the patient developed headache, confusion, aphasia, and right upper extremity apraxia. Imaging revealed an extra-axial collection at the craniotomy site; on reexploration, a swollen, engorged pericranial flap causing mass effect was found.InterventionThe pericranial flap was excised.ConclusionIn this case, hypertrophy of the vascularized pericranial flap is hypothesized to have occurred because of venous congestion, possibly secondary to restriction of venous outflow by the overlying bone flap.

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