Duodenal target sign Ana Laranjo; Maria Carvalho; Andreia Rei; Nuno Veloso;

Malignant transformation in fistula after proctosigmoidectomy: A rare complication of long-standing Crohn's disease Francisco Vara-Luiz; Ivo Mendes; Ana Elisa Teles; Carla Oliveira; Ana Pascoal; Cláudia Afonso; Marta Patita; Irina Mocanu; Ana Vieira; Vítor Fernandes; Pedro Moniz Pereira; Jorge Fonseca;