This document discusses injuries to the trunk, including thoracic and abdominal injuries. It covers life-threatening injuries like tension pneumothorax, hemothorax, cardiac tamponade, and aortic rupture. It describes treatments for these injuries like needle thoracocentesis, chest tube placement, and pericardiocentesis. Abdominal injuries discussed include injuries to the spleen, liver, mesentery, and hollow organs. Grading systems are provided for spleen and liver injuries. Surgical treatments like splenectomy are also mentioned.