You’d think dizziness would be a common first report of a tumor that grows on the vestibular nerve, right? When it comes to vestibular schwannoma (acoustic neuroma), dizziness is usually not the first symptom reported. Because these tumors grow slowly, the brain has time to adapt. This gradual compensation typically results in imbalance, but not true vertigo. The first symptoms are usually: 👂🏽Unilateral hearing loss 👂🏽Unilateral tinnitus 👂🏽A vague sense of imbalance, especially in the dark

Translabyrinthine approach for vestibular schwannoma - Mayo Clinic