title: Wilms tumor occurring as a botryoid renal pelvicalyceal mass.
abstract: Wilms tumor usually occurs as an abdominal mass arising from the renal parenchyma. A case was encountered in which the neoplasm filled the pelvicalyceal system of an 8-year-old boy as a botryoid mass, with minimal parenchymal involvement. The radiologic manifestations, pathologic features, and surgical implications are discussed.
mesh_terms: D002648:Child; D006801:Humans; D007670:Kidney Calices / Q000473:pathology* / Q000601:surgery; D007680:Kidney Neoplasms / Q000175:diagnosis* / Q000601:surgery; D007682:Kidney Pelvis / Q000473:pathology*; D008297:Male; D009361:Neoplasm Invasiveness; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography; D014567:Urography; D009396:Wilms Tumor / Q000175:diagnosis* / Q000601:surgery