Paraduodenal Pancreatitis: A Deceptive Abdominal Mass with Unique Histologic Findings

Figure 3

Characteristic eosinophilic concretions in paraduodenal pancreatitis. (a) Eosinophilic concretion within a branch of the pancreatic duct tree enclosed by an attenuated flat epithelium, normal exo- and endocrine pancreas on the bottom (H&E, 400x). (b) Eosinophilic concretion with associated chronic inflammation and dilation of a pancreatic duct branch (H&E, 200x). (c) Leaked concretions leading to a foreign-body giant cell reaction (arrow) with fibrosis (asterisk) (H&E, 200x). (d) Few eosinophilic concretions accompanied by inflammatory cells and spindled stromal cells identified in the cell block of a preoperative FNA aspirate (H&E, 400x).

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