Methods We reported 21 patients with intradural extramedullary tumors undergone surgery through unilateral hemilaminectomy, including 14 schwannomas and 7 meningiomas.

• 方法报道经单侧半椎板切除21例椎管内肿瘤,肿瘤均位于髓外硬膜下,其中神经鞘瘤14例,脊膜瘤7例。