Underlying etiology associated with the diagnosis of absent contractility on high resolution esophageal manometry Luis Gerardo Alcalá-González; Alba Jimenez-Masip; Lucia Relea-Pérez; Claudia Barber-Caselles; Elizabeth Barba-Orozco;

A challenging alpha-fetoprotein after liver transplantation Emanuel Dias; Hélder Cardoso; Eduardo Rodrigues-Pinto; Raquel Portugal; Guilherme Macedo;

Colonic granular cell tumor identified in an adenomatous polyp Emanuel Dias; João Santos-Antunes; Ana Luísa Santos; Rosa Coelho; Daniel Melo; Guilherme Macedo;