Fig. 2
From: Pancreatic acinar cell carcinoma with extension into the main pancreatic duct: a case report
a Endoscopic ultrasonography (EUS) shows a low-echoic solid mass in the pancreatic tail. b EUS shows intraductal tumor infiltration in the MPD. The splenic vein is intact. White arrows show the downstream intraductal infiltration of tumor in the MPD. c Endoscopic biopsy specimen for hematoxylin and eosin (H&E) staining reveals an acinar growth of tumor cells with eosinophilic and granular cytoplasm (×200). d Immunohistochemistry shows passivity for α1-antitrypsin (×200). e Immunohistochemistry shows positivity for B-cell lymphoma/leukemia 10 (×200)