The first calcified acoustic neurinoma identified in China: a case report and literature review.

Here we reported the first case of left cerebellopontine angle acoustic neurinoma with calcification in our department. The patient was 65 year-old, suffering from progressive loss of hearing in the left ear for about 30 years and headache with unsteady gait for approximately 6 months. Head CT & MRI scan identified an intracranial lesion located on left cerebellopontine angle. Left suboccipital retrosigmoid approach was applied to perform the operation after patient consent. The tumor was completely resected without complication and the patient recovered well. Histological findings revealed Spindle-shaped tumor cells tightly compacted to form the Antoni A region, while loosely arranged to form the Antoni B region. Hyaline degeneration and calcification formation were observed across the majority of the tumor.