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A 31-year-old male intravenous drug abuser found unconscious. Blood pressure at presentation was 180/110 mmHg. (a–d) Brain MRI [fluid attenuated inversion recovery (FLAIR) sequence] demonstrated marked vasogenic oedema in the white matter of the parietal and occipital regions, most severe in the cerebellum, with resultant obstructive hydrocephalus. (e–h) Brain MRI (FLAIR sequence) performed 6 weeks later demonstrates resolution of the vasogenic oedema seen on the previous MR study.
