title: Botryoid Wilms' tumor of the renal pelvis.
abstract: We studied a unique example of Wilms' tumor consisting entirely of a polypoid intrapelvic renal mass. Despite a gross appearance akin to sarcoma botryoides, this and related examples of Wilms' tumor with intrapelvic growth should be treated no differently from ordinary Wilms' tumors of similar stage and grade.
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007223:Infant; D007668:Kidney / Q000473:pathology; D007680:Kidney Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000628:therapy; D007682:Kidney Pelvis; D012208:Rhabdomyosarcoma / Q000175:diagnosis; D009396:Wilms Tumor / Q000175:diagnosis / Q000473:pathology* / Q000628:therapy