Hypertrophic Olivary Degeneration: Neurosurgical Perspective and Literature Review

•HOD may complicate the recovery of patients with posterior fossa or brainstem lesions.•Posterior fossa tumors and cavernomas are the most common etiology of HOD in this series.•Neurosurgeons who are treating lesions involving dentate-rubro-olivary tract should be aware of clinical and imaging signs of HOD.