Fig. 4From: Lung metastases from intraductal papillary neoplasm of the bile duct: a case reportMacroscopic and pathological findings from the recurrence. a Macroscopic findings from the recurrence revealed a papillary tumor in the cystic tumor (white arrow). b Hematoxylin and eosin staining revealed papillary growth at the epithelium and abundant mucus production. Immunohistochemistry findings are shown for c MUC1, d MUC2, e MUC5AC, and f MUC6Back to article page