Primary central nervous system extranodal NK/T cell lymphoma, nasal type colliding with meningioma: First Report.

•Collision intracranial lymphomas are extremely rare.•This is the first report of a collision tumor consisting of ENKTCL, nasal type and meningioma.•Collision tumors are difficult to diagnose preoperatively owing to lack of special or unique clinical features.•Pathologic identification is often the best way to ensure a correct diagnosis.