A papillary tumor originating in the renal pelvis. The disease is renal pelvis papillary tumor (Monarch Disease Ontology term MONDO_0003717). Also known as: papillary neoplasm of renal pelvis, papillary neoplasm of the renal pelvis, papillary tumor of renal pelvis, papillary tumor of the renal pelvis, papillary tumour of renal pelvis, papillary tumour of the renal pelvis, renal pelvis papillary urothelial neoplasm.