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Headache after skull base surgery can cause profound morbidity in certain patients, resulting in significant impairment of their quality of life. Several methods to prevent postoperative headache have been described, including a modification of the skin/muscle incision replacing the craniotomy bone flap replacing the bone flap and filling in the residual defect with methyl methacrylate, using hydroxyapatite cement (HAC) to fill the craniectomy defect, and wiring hardened methyl methacrylate (MMA) into the defect. Ten patients with severe headache following craniectomy for a posterior fossa lesion underwent cranioplasty with MMA, which was placed exactly within the craniectomy defect and secured rigidly with miniplates and screws. The headache decreased in severity in all patients and resolved completely in 90%. Also, 78% of patients with dizziness improved. The procedure and its effect on headache and dizziness will be described.