Lymphoma of the cerebellopontine angle mimicking metastasis lesion: A case report

Primary lymphoma of the cerebellopontine angle (CPA) is rare and uncommon in the central nervous system, accounting for approximately 0.2-2% of all brain tumors. To our knowledge, there have only been 32 cases reported worldwide so far. Here, we report a rare case of B-cell lymphoma in a 56-year-old woman who presented with seizure, dysphagia, and dizziness and showed a lesion involving the left CPA, right frontal horn and septum pellucidum on magnetic resonance imaging (MRI). The primary diagnosis was metastatic tumor; however, Stereotactic biopsy on left CPA lesion was done, and the histological features confirmed the diagnosis of B-cell malignant lymphoma. The patient was treated with chemotherapy, with complete resolution of symptoms after the first chemotherapy session.