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Washington University Experience | NEOPLASMS (EMBRYONAL) | ATRT - Atypical Teratoid Rhabdoid Tumor | 10A6 ATRT (AANP 2005 Case 4) H&E 1

The tumor is cellular with a population of rhabdoid cells and undifferentiated forms. (H&E) ---- Ancillary data presented at conference: Tumor cells were positive for EMA and negative for SMA. The Ki-67 labeling index was high. FISH studies revealed monosomy of chromosome 22 in 73/100 cells, and the tumor cells were negative for INI1.

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