cerebellopontine angle
nounMedical Definition of cerebellopontine angle
: a region of the brain at the junction of the pons and cerebellum that is a frequent site of tumor formation
The most common causes of secondary trigeminal neuralgia are multiple sclerosis and acoustic neuroma; tumors and cysts in the cerebellopontine angle may also cause trigeminal neuralgia.— Emad Eskandar et al., The New England Journal of Medicine, 13 July 2006