Educational draft · awaiting clinical reviewUse Rapid for revision, not patient-care decisions. Check current national and local guidance and the BNF or BNFC before acting.
A large cerebellopontine-angle lesion can compress the brainstem or disrupt cerebrospinal fluid circulation, while sudden hearing loss may require time-sensitive treatment regardless of the underlying lesion.
Action: Arrange emergency assessment for worsening consciousness, severe headache with vomiting or new focal neurological deficits; use the twenty-four-hour referral pathway for recent unexplained sudden hearing loss.
Synopsis
Recognise symptoms that justify internal auditory meatus imaging and explain how tumour behaviour, hearing, neurological function and patient preferences guide specialist management.
Vestibular schwannoma is usually a benign tumour arising from vestibular nerve Schwann cells.
Asymmetric sensorineural hearing loss, unilateral tinnitus and imbalance are important presentations.
MRI of the internal auditory meati assesses the nerve and cerebellopontine angle.
Key red flags
Progressive headache, repeated vomiting, marked gait deterioration or new cranial nerve deficits in a person with a known lesion requires urgent specialist assessment.
Investigation priorities
01
MRI of the internal auditory meatiFirst step
Identify a vestibular schwannoma or another cerebellopontine-angle lesion.
National guidance is shown before implementation-dependent detail. Typical adult dose examples remain subject to patient factors, contraindications and the live BNF or specialist protocol. Source check completed 7 Sept 2026; clinical approval remains outstanding.