Wilms tumor occurring as a botryoid renal pelvicalyceal mass.

@article{Johnson1987WilmsTO,
  title={Wilms tumor occurring as a botryoid renal pelvicalyceal mass.},
  author={Kevin M. Johnson and Laura J. Horvath and Godfrey Gaisie and Hrair George O Mesrobian and J F Koepke and Frederic Barton Askin},
  journal={Radiology},
  year={1987},
  volume={163 2},
  pages={385-6}
}
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.