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Tumor from patient 2 comprised of blastemal and epithelial components (A, B), mesenchymal component containing rhabdomyosarcoma and hyaline cartilage (C). WT1 is positive in epithelial and blastemal cells (D). Hematoxylin-eosin stain (A-C), immunohistochemical stain (D); magnification x100 (A, C), x200 (B, D).
