Very high serum levels of CA 19-9 in autoimmune pancreatitis: Report of four cases and brief review of literature

Figure S1. A marked fibro-inflammatory reaction is documented. There is a notabe focal dilatation of the pancreatic ductal tree. The ducts show dense fibrosis, sometimes with a typical storiform pattern. As a result, there are some obstructive phenomena with upstream dilatation of the ductal tree upstream, which is very similar to a conventional pancreatic adenocarcinoma. Interestingly, in this case this morphological feature is widespread in...