A vestibular schwannoma (also known as acoustic neuroma, acoustic neurinoma, or acoustic neurilemoma) is a benign, usually slow-growing tumor that develops from the VIIIth cranial nerve supplying the inner ear. The phenotype is Human Phenotype Ontology entry HP_0009588 (Vestibular schwannoma). Also known as: Acoustic Neuroma, Vestibular Schwann cell tumor, Vestibular Schwann cell tumour, Vestibular neurilemmoma, Vestibular neurinoma, Vestibular neurolemmoma.