Fig. 6From: Lymphomatosis cerebri: a rare variant of primary central nervous system lymphoma and MR imaging features a Brain biopsy specimen from the case 1 shows dispersed round neoplastic cells spreading along the white matter tracts without causing tissue destruction or mass formation and are occasionally clustered around blood vessels (H&E × 400). b Immunohistochemistry shows that the atypical cells were positive for CD20, a marker for b cellsBack to article page