Differential diagnosis of retroperitoneal tumor: chronic adrenal hematoma, an uncommon diagnosis Álvaro Soler-Silva; Verónica Aranaz-Ostáriz; Sandra Lario Pérez; José Antonio Barreras;

Extra-adrenal paraganglioma: Mesenteric tumour of uncommon origin Álvaro Soler-Silva; María Cabezas; Ibán Caravaca García; Alicia Calero;

Surgical anatomy applied to transperitoneal approaches of the abdominal aorta and visceral trunks. Dynamic article Delfina Fletcher-Sanfeliu; Álvaro García-Granero; Alberto Doménech Dolz; Gianluca Pellino; Francisco Orbis; Antonio Arroyo; Alfonso A. Valverde-Navarro; Luis Sabater Ortí; Iván Martín-González;