Fig. 4From: Advanced-stage Wilms tumor arising in a horseshoe kidney of a 9-year-old child: a case reportImage shows that the resected tumor (a) is irregular and the cut surface (b) appears variegated, with a mixture of tan brown, gray, and black colors. Photomicrograph show (c) epithelial cells (arrow) - H&E x 200; (d) mesenchymal cells (M) and blastemal cells (B) - H&E x 100 with high mitotic activityBack to article page