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Histologic features of Atypical Teratoid Rhabdoid Tumor. (a) Histologic examination of the tumor reveals diffuse eosinophilic cytoplasmic globules, vesicular chromatin, and scattered large pleomorphic nucleoli (hematoxylin and eosin 40x). (b) Loss of INI-1 expression of the neoplastic cells by immunohistochemistry staining confirms the diagnosis of ATRT (40x).
