Figure 3.

 Representative histological images. (A) Pancreatic duct surrounded by a prominent lymphoplasmacytic infiltrate and collagen deposits (arrows). (B) Pancreatic vein showing dense lymphoplamacytic infiltrate and perivenular fibrosis (haematoxylin-eosin, ×200 for all images). (A) and (B) correspond to case No 1 in table 4 ▶. (C) Prominent interstitial fibrosis and diffuse lymphoplamacytic infiltrate, which corresponds to patient No 3 in table 4 ▶. (D) Pancreatic duct surrounded by a mononuclear lymphoplamacytic infiltrate which corresponds to patient No 4 in table 4 ▶.