cystadenoma papillary adenoma papillary cystic neoplasm papillary cystadenoma UMLS:C0010636 NCIT:C2974 papillary cystadenoma MESH:D018292 MEDGEN:41386 cystadenoma, papillary, benign MONDO:0021091 ICDO:8450/0 A serous or mucinous benign or low malignant potential cystic epithelial neoplasm. It is characterized by the presence of glandular epithelial cells forming papillary structures.