Primary non-hodgkin lymphoma of lateral skull base mimicking a trigeminal schwannoma: case report.

Primary extranodal lymphoma is a common malignant tumor of head and neck but rarely presents in lateral skull base. We reported such a case of lymphoma categorized as diffuse large B-cell lymphoma (DLBCL) subtype in a 74-year-old Chinese female. She has experienced an acute course of continuously trigeminal neuralgia and Horner's syndrome. The lesion was diagnosed as trigeminal schwannoma based on symptom and medical image before operation then confirmed to be DLBCL pathologically.