[General surgery].
Terrorist explosions with multiple victims produce disaster situations that test health systems' ability to respond. The Gregorio Maranon University Hospital attended more than 300 victims within a few hours. Most of these victims had mild or moderate lesions, although 29 patients arrived in a serious or critical condition. In the first 24 hours, 37 major surgical interventions were performed in 34 patients. Of these, patients 7 underwent laparotomy, 2 of which were negative and one was non-therapeutic. One patient died during reintervention for damage limitation. Three angiographic embolizations were performed for bleeding of the intercostal artery, liver and liver-spleen, respectively and hemostasis was achieved in all three patients. The most common lesions and visceral injuries in particular were similar to those described in previous reports of similar situations. We reflect on our experience and discuss data from the literature.