title: Wilms tumor extending into the dilated renal pelvis as a mold.
abstract: A case of Wilms tumor associated with hydronephrosis is reported. The tumor extended into the dilated renal pelvis but there was no invasion in the mucosa of the ureter or renal pelvis.
mesh_terms: D004108:Dilatation, Pathologic; D005260:Female; D006801:Humans; D006869:Hydronephrosis / Q000209:etiology; D007223:Infant; D007680:Kidney Neoplasms / Q000150:complications / Q000473:pathology*; D007682:Kidney Pelvis / Q000473:pathology*; D009361:Neoplasm Invasiveness; D009396:Wilms Tumor / Q000150:complications / Q000473:pathology*