FINDINGS Figure 96-1. Axial T2WI through the medulla. There is hyperintensity within the right medullary olive with minimal swelling (white arrow). Figure 96-2. Axial post-contrast T1WI. The lesion does not show pathologic enhancement to suggest the presence of a metastatic lesion. However, more superiorly, at the level of the contralateral superior cerebellar peduncle, there is a small enhancing focus compatible with metastasis (white arrow).
DIFFERENTIAL DIAGNOSIS Metastatic disease, ischemia, demyelination, hypertrophic olivary degeneration (HOD).
DIAGNOSIS Hypertrophic olivary degeneration (HOD).
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