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Washington University Experience | NEOPLASMS (EMBRYONAL) | ATRT - Atypical Teratoid Rhabdoid Tumor | 9C5 ATRT (Case 9) H&E 6.jpg
Sections of leptomeninges show patchy collections of a primitive cellular neoplasm. The tumor consists of embryonal tumor cells with brisk mitotic activity which fail to form differentiated structures such as glands or neuroblastic rosettes.
