Fig. 2

Patient characteristics according to bilateral DC operation plans. Pre-operative scheduled bilateral DC patients: bilateral lesions were detected at admission. Intraoperative scheduled contralateral DC patients: Unilateral lesions were identified at admission and received unilateral DC. But according to intraoperative ICP values, abnormal brain swelling and et al. these patients were suspected to suffer contralateral lesions. After confirmed by intraoperative CT scans, these patients received immediately contralateral DC. Post-operative immediately contralateral DC patients: Unilateral lesions were identified at admission, and after initial DC, no abnormal signs, symptoms or intraoperative CT scans findings were detected during operations. Abnormal high ICP value (> 20 mmHg) were detected before these patients were sent back to NICU. These patients received immediately CT scans and contralateral lesions were detected, and then these patients were sent back to operation rooms without delay to receive contralateral DC. Unplanned contralateral DC patients: These patients were safely sent back to NICU after unilateral DC. Contralateral lesions were identified and contralateral DC were performed during hospitalization