- Histopathologic evaluation of stepwise progression of pancreatic carcinoma with immunohistochemical analysis of gastric epithelial transcription factor SOX2: comparison of expression patterns between invasive components and cancerous or nonneoplastic intraductal components. Sanada, Y., Yoshida, K., Ohara, M., Oeda, M., Konishi, K., Tsutani, Y. Pancreas (2006)