LAUSR

A 30-year-old man underwent MRI of the internal auditory meatus as a routine follow-up after excision of a large left vestibular schwannoma, 2.5 years previously. MRI images showed an incidental finding of left hypertrophic olivary degeneration (figure 1 and figure 2). This phenomenon occurs as a result of Wallerian degeneration of the olivary nucleus secondary to a lesion in the triangle of Guillain and Mollaret, also known as the dento-rubro-olivary pathway (figure 3). The differential …