A 68-year-old man presented with hemiparesis, lymphocytosis, and cerebral lesions on MRI. Flow cytometry of blood, bone marrow and cerebrospinal fluid showed B-CLL lymphocytes with bright CD20 expression, sIg, and absence of CD23 antigen. Fluorescence in situ hybridisation showed trisomy 12 in 50% of analysed peripheral mononuclear cells. The patient died 6… (More)
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