Case Report
Copyright ©The Author(s) 2022.
World J Gastrointest Oncol. Jul 15, 2022; 14(7): 1356-1362
Published online Jul 15, 2022. doi: 10.4251/wjgo.v14.i7.1356
Figure 2
Figure 2 Primary signet ring cell carcinoma of the extrahepatic bile duct. A: Hematoxylin and eosin staining (× 400), showing signet ring cells (arrows) with abundant intracytoplasmic vacuoles and peripherally displaced nuclei (red arrows); B-F: Immunohistochemistry staining (× 400), CK19, CAM5.2, CK7, CEA, and PAS-positive staining, respectively.