S100B and meningioma: Our results are in agreement with previous work by Stranjalis et al. [11], who demonstrated in patients undergoing meningioma resection that the increased S100β level area under the curve up to seven days postcraniotomy was the most significant predictor for postoperative neurological deterioration and that those patients with increased postoperative S100β values had greater risk of poor outcome up to six months after surgery.