Summaries of the papers of the 4th National Congress of the Tunisian Society of Medical Oncology attached to the 4th Maghreb Congress of Oncology. - Abbes I; Abdelhak S; Abdelhedi C; Abid K; Abidi R; Acacha E; Achour S; Achour A; Adouni O; Afrit M; Ahlem A; Akik I; et al. (La Tunisie medicale, 2017)