The aim of this case report is to discuss the rare postoperative complication of abdominal compartment syndrome in a 19-year-old Caucasian Greek male that was electively operated on for a congenital diaphragmatic hernia. The hernia was completely asymptomatic and was found in chest radiography for employment reasons. Abdominal compartment syndrome is related in most reports with trauma and abdominal operations. Timely diagnosis is key to the prevention of further organ damage and multisystem organ dysfunction because the syndrome once instituted is highly fatal.