urothelial hyperplasia papillary urothelial hyperplasia MEDGEN:235457 A type of hyperplasia that is characterized by variable thickening of the urinary tract epithelium and a slight papillary growth. The latter is not associated with the presence of fibrovascular cores. There is no evidence of atypia. The relationship between this lesion and papillary urothelial neoplasia is not clear. -- 2003 NCIT:C27879 UMLS:C1335328 MONDO:0024485 papillary urothelial hyperplasia