Respiratory epithelial cyst in the cerebellopontine angle

The authors report a case with a cerebellopontine angle cystic mass. Computed tomography scan failed to demonstrate the lesion. Vertebral angiogram revealed an extra-axial lesion in the cerebellopontine angle. After successful surgical removal, it was found to be a respiratory epithelial lining cyst. The literature and histogenesis of this lesion are reviewed.