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胰腺导管腺癌的超声内镜及病理表现

Endosonographic and pathological features of pancreatic ductal adenocarcinoma. A: A 29.7 mm × 22.5 mm hypoechoic, heterogeneous mass in the head of the pancreas (white arrow), blurred with the confluence of superior mesenteric vein (#) and portal vein (^*). B: Pathological examination of the surgical specimen confirmed diagnosis of adenocarcinoma (HE staining, original magnification × 200). C: Endoscopic ultrasound-guided fine needle aspiration with both cytology and microhistology. Cytology showed a cluster of malignant cells (HE staining, × 400). D: Microhistology confirmed the diagnosis of adenocarcinoma (HE staining, ×200).