Changes in the 6th edition of the World Health Organization classification of tumours of the digestive system. - Arends MJ; Esposito I; Gill AJ; Hruban RH; Khoury JD; Kojima M; Montgomery EA; Abdulkareem F; Carneiro F; Costamagna G; Lauwers G; Polydorides AD; et al. (Histopathology, 2026)