CSP: pediatric nephroblastoma originating from embryonic kidney stem cells; usually affects children before the fifth year, but may occur in the fetus or rarely in later life; caused by defects in one or more tumor suppressor genes.,CSP: malignant kidney tumor made up of three cell types: blastemal, stromal, and epithelial, but not all present in every case.,NCI: A disease in which malignant (cancer) cells are found in the kidney, and may spread to the lungs, liver, or nearby lymph nodes. Wilms tumor usually occurs in children younger than 5 years old.,NCI: An embryonal pediatric tumor of the kidney which may also be seen rarely in adults. The peak incidence of Wilms tumor is between the second and fifth year of life. Microscopically, it is composed of a mixture of cellular elements (blastemal, stromal, and epithelial). The most common sites of metastasis include the regional lymph nodes, lungs, and liver.,NCI: An embryonal neoplasm characterized by the presence of epithelial, mesenchymal, and blastema compon

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