McDonald MF, Rao G, Mandel JJ.
Hypertrophic Olivary Degeneration Postoperatively Following Pilocytic Astrocytoma Resection.
World Neurosurg 2022;
165:18-19. [PMID:
35718276 DOI:
10.1016/j.wneu.2022.06.045]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 06/08/2022] [Accepted: 06/09/2022] [Indexed: 10/18/2022]
Abstract
A 25-year-old male presented with headaches 3 weeks after a car accident. His MRI images showed a hemorrhagic vermis mass with 4th ventricle effacement. One month later, he underwent suboccipital craniotomy for removal of a pilocytic astrocytoma. A 3-month postoperative scan demonstrated a new area of medullary hyperintensity in the inferior olive also present 7-months postoperatively consistent with hypertrophic olivary degeneration (HOD). This condition is caused by disruption to the dento-rubro-olivary pathway with MRI enlargement of the inferior olivary nucleus and increased T2 signal. HOD should be considered after cerebellar surgery and should not be mistaken for tumor recurrence.
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