Vestibular ganglion

The vestibular ganglion (also called Scarpa's ganglion) is the ganglion of the vestibular nerve that is located inside the internal auditory meatus, at the union of the superior and inferior branch of the vestibular nerve.

The ganglion contains the cell bodies of bipolar neurons whose peripheral processes form synaptic contact with hair cells of the vestibular sensory end organs.

On an inner-ear MRI, vestibular ganglia may mimic intracanalicular vestibular schwannomas on a single-sequence T2W MRI. However, a fusiform shape and width <1.3 mm increases confidence in the diagnosis of ganglia.