Sister Mary Joseph's Nodule Revealing Klatskin's Cholangiocarcinoma at the Yalgado Ouedraogo University Hospital: Case Report and Literature Review. - Ky, Lawagoulé Joseph Emile; Mourfou, Eric Hervé; Maïga, Abdoul Fatao; Sangaré, Daouda; Traoré, Damien Marcel; Santi, Saïdou; Koanda, Madina; Sanfo, Alimata; Napon/Zongo, Delphine; Coulibaly, Aboubacar; Somda, Kounpiélimé Sosthène; Sombié, Arsène Roger (Clinical Case Reports, 2025)