NCIt definition : A variant of Wilms tumor of the kidney characterized by the presence of cystic spaces
separated by septa. The septa contain immature epithelial cells, immature stromal
cells, and blastema cells. Surgical resection is usually curative.;
Alternative definition : NICHD: A rare, cystic variant of Wilms tumor wholly comprising cysts in which their
thin septa form the only solid portion of the tumor.;