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Washington University Experience | NEOPLASMS (GLIAL) | Glioblastoma, small cell type | 6C GBM, small cell (Case 6) MIB 1

Ki-67 demonstrates a labeling index of 10.1%. ---- Additional Immunohistochemical stains: An immunohistochemical stain for GFAP shows strong positivity. Synaptophysin highlights background cell processes. ---- 6D1-3 FISH Studies: There is evidence of polysomy 1 (6D1), polysomy 19 (6D2) and EGFR gene amplification (6D3). Specifically, there is no evidence of deletion of either 1p or 19q.

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