papillary urothelial neoplasm urinary tract non-invasive transitional cell neoplasm urothelial papilloma A rare benign condition, characterized by a papillary growth in the urinary tract with a central fibrovascular core. The latter is lined by normal urothelium. DOID:6933 ICDO:8120/1 MONDO:0004041 NCIT:C3842 ONCOTREE:UPA bladder papilloma bladder transitional cell papilloma transitional cell papilloma of bladder uPA urinary bladder urothelial papilloma urothelial papilloma benign urinary system neoplasm transitional cell papilloma