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Teratocarcinosarcoma. A) There is a blend of spindled cells, epithelial elements and primitive cells. B) The mesenchymal spindled cell component is juxtaposed with malignant glandular elements. C) An area of squamoid differentiation shows clear cell change, while the primitive neuroectodermal component has a high nuclear to cytoplasmic ratio. D SMARCA4 is lost as reflected by a negative BRG1 stain. Note retained expression in lymphocytes, a helpful internal control
