We report immunohistochemical mucin features in a case of intraductal papillary mucinous adenoma (IPMA). Tumor cells were positive for MUC2, CDX-2, MUC5AC, and human gastric mucin but negative for MUC1 and M-GGMC-1. Immunocytochemical mucin-marker analysis proved useful in IPMN subtyping.
