Fig. 4
Histopathological findings. a Microscopic evaluation after hematoxylin-eosin staining of the tumor tissue revealed moderately differentiated tubular adenocarcinoma (original magnification, ×13). b Elastic Van Gieson staining revealed an artery penetrating through the wall of the pancreatic pseudocyst (original magnification, ×6). c Elastic Van Gieson staining revealed an artery rupturing into the pancreatic pseudocyst (original magnification, ×6)