Exploring the unexpected: sensorineural hearing loss and vertigo as a complication of mumps.

Mumps, an acute viral infection characterised by parotid gland swelling, can lead to sensorineural hearing loss (SNHL) and vestibular symptoms. This report discusses a man in his early 30s who developed right-sided SNHL and vertigo 1 week after bilateral parotid swelling and orchitis. Elevated mumps IgM antibody titre confirmed the diagnosis. Audiometry revealed a profound hearing loss in the right ear. MRI showed fluid-attenuated inversion recovery hyperintensities in the right inner ear, indicating labyrinthitis. Despite treatment with oral and intratympanic corticosteroids, hearing did not improve, though vestibular symptoms resolved within a month. This case highlights the pathogenesis of mumps-induced inner ear involvement, aligning with previous studies indicating severe, often irreversible SNHL and transient vestibular symptoms due to viral endolymphatic labyrinthitis. Radiological findings supported the diagnosis, emphasising the importance of comprehensive evaluation in mumps-related complications.