Akcam, Atilgan Tolga, Abdullah Ülkü, Ahmet Rencuzoğulları, Cem Kaan Parsak, Zeynep Yapar, Figen Doran, Haluk Demiryürek, and Alexis Kofi Okoh. “18F-FDG Activitiy PET CT and CA-19.9 Levels for the Prediction of Histopathological Features and Localization of Peri- Ampullary Tumors”. Turkish Journal of Gastroenterology 26, no. 2 (January 2, 2015): 170–175. Accessed January 1, 2026. https://www.turkjgastroenterol.org/index.php/tjg/article/view/2713.