KIDNEY TUMORS IN CHILDREN

Benign kidney tumors are almost never found in children; cancer and sarcomas are extremely rare, and the most common in them are "mixed tumors", also called embryomas, embryonic tumors, adenosarcomas, adenomyosarcomas, Wilms' tumors. According to Wilms, they come from undifferentiated mesodermal tissue and are the product of dysontogenetic development. Histologically, they consist of sarcomatous and glandular elements mixed with each other, often with the inclusion of muscle, cartilaginous, bone, nervous and other tissues.