In this case report, a female patient with schizophrenia was diagnosed with a cystic vestibular schwannoma, at the age of 28 years. Since her teenage years, the patient had been showing psychiatric symptoms and had suffered from vertigo and auditory hallucinations, and since adulthood the symptoms were unilateral perceptive hearing loss, tinnitus and vertigo. In patients with psychiatric disorders, clinicians should be especially aware of changes in persistent symptoms or onset of new symptoms not to overlook any organic disease.