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;

Uncommon cause of upper gastrointestinal bleeding: spontaneous large gastric intramural hematoma Tiago Lima Capela; Tiago Cúrdia Gonçalves; Joana Magalhães; José Cotter;

Leishmania colitis: an uncommon cause of gastrointestinal bleeding in an immunosuppressed patient Francisco Vara-Luiz; Helena Pires; Ivo Mendes; Carolina Palma; Eduardo Fernandes; Ana Elisa Teles; Francisco Martins do Vale; Marta Patita; Jorge Fonseca; Pedro Pinto-Marques;