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Washington University Experience | MYELIN (IMMUNE-MEDIATED) | Sentinel & Steroid Rx Lesions | 2B3 Sentinel Lesion (Case 2 - 1st Bx) area A H&E 4.
Increasing magnification of the neurosurgical biopsy shows perivascular collections of small inflammatory cells, which were thought to be reactive; however, they are quite large for a reactive infiltrate and yet show only equivocal definitive pleomorphic nuclei or mitotic activity.