Fig. 1: Pseudo-IPMNs characterized by cysts showing papillary and mucinous linings. | Modern Pathology

Fig. 1: Pseudo-IPMNs characterized by cysts showing papillary and mucinous linings.

From: Pancreatic ductal adenocarcinomas associated with intraductal papillary mucinous neoplasms (IPMNs) versus pseudo-IPMNs: relative frequency, clinicopathologic characteristics and differential diagnosis

Fig. 1

A Invasive carcinoma invading to a secondary (retention) cyst is forming a compact papillary nodule virtually indistinguishable from an IPMN. B This retention cyst is lined partially by normal ductal epithelium (left), and partially by invasive carcinoma colonizing the surface (cancerization, right) mimicking IPMN (H&E stain). Invasive carcinoma is typically seen on the wall of these cysts (lower left in (A), and middle-lower in (B)).

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