1. Lokuhetty D, White V, Watanabe R, Cree IA, editors. Digestive system tumours. WHO classification of tumours. 5th ed. Lyon: IARC Press; 2019.
2. Brierly JD, Gospodarowicz MK, Wittekind C, editors. UICC TNM classification of malignant tumours. 8th ed. London: Wiley-Blackwell; 2016.
3. Amin MB, Edge SB, Greene FL, Byrd DR, Brookland RK, Washington MK, Gershenwald JE, Compton CC, Hess KR, Sullivan DC, Jesus JM, Brierley JD, Gaspard LE, Shcilsky RL, Balch CM, Winchester DP, Asare EA, Madera M, Gress DM, Meyer LR (eds) (2017). AJCC cancer staging manual, 8, Springer, New York, NY.
4. Kakar S, Shi C, Adsay NV, Fitzgibbons P, Frankel WL, Klistra DS, Karsinskas AM, Mino-Kenudson M, Pawlik T, Vauthey J-N, Washington MK. Protocol for the examination of specimens from patients with carcinoma of the pancreas. Northfield, IL: College of American Pathologists (CAP); 2017.
5. Campbell F, Cairns A, Duthie F, Feakins R. Dataset for the histopathological reporting of carcinoma of the pancreas, ampulla of Vater and common bile duct. 2017. www.rcpath.org. Accessed 30 Dec 2019.