A 47-year-old man presented with a 6-week history of left facial paraesthesia, diplopia, and progressive ataxia with altered sensation in both feet. Contrast magnetic resonance imaging (MRI) of brain and spinal cord demonstrated abnormal thickening and leptomeningeal enhancement of all visible cranial nerves, most striking in cranial nerves III (A) and V (B). Further leptomeningeal enhancement was evident in the anterior pons, brainstem, and cauda equina, but no parenchymal brain or spinal cord lesions were present.
From: Wilson MR, McKay P, Leach M. Primary leptomeningeal B-cell lymphoma.
Br J Haematol 2019; 187:412.
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