disease arises from structure blastemal cell embryonal neoplasm malignant mixed neoplasm Wilms tumor An embryonal neoplasm characterized by the presence of epithelial, mesenchymal, and blastema components. The vast majority of cases arise from the kidney. A small number of cases with morphologic features resembling Wilms tumor of the kidney have been reported arising from the ovary and the cervix. EFO:1000056 GARD:0007892 MESH:D009396 MONDO:0006058 NCIT:C3267 UMLS:CN244940 Wilms tumor Wilms tumor (nephroblastoma) Wilms' tumor