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(a) Triphasic cellular pattern because of the presence of undifferentiated blastemal cells (H/E, 4x). (b) Triphasic pattern: a neoplastic admixture of epithelial (neuroepithelial rosette like structures), blastemal and stromal (immature muscular and cartlageneous) components (H/E, 10x).
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Histologically, the lesion showed diffuse necrotic-hemorrhagic and cystic changes, with a triphasic cellular pattern because of the presence of undifferentiated blastemal cells and cells differentiating toward epithelial and stromal lineages (Fig. 1a and b).
Pattern of Cytokeratin MNF116 (10x).
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Wilmor tumors (10x).
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Surgical Pathology, 2011), Stade III sec. SIOP (Med Pediatr Oncol 2002;38:79-82) (Fig. 3).
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