Hypertrophic olivary degeneration
Previous pontine bleed (6 months ago)
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A region of hemosiderin staining with blooming artefact is seen in the left side of the pons consistent with a prior hemorrhage. There is likely an underlying cavernoma. The inferior olivary nucleus demonstrates striking increase in T2 signal and is swollen. No contrast enhancement.
Typical appearances of striking hypertrophic olivary degeneration.