Abstract
Introduction: Bochdaleck hernias (BH) are a congenital defect in the diaphragm's postero lateral part that may cause the abdominal viscera's protrusion into the chest cavity. This type of hernia is rare in adults. Most cases are referred to the emergency department with gastrointestinal obstruction and visceral strangulation symptoms. Case presentation: A 50-year-old man was referred to the emergency department complaining of abdominal pain in the left upper quadrant, intermittent vomiting, and pain in the left hemithorax from one day ago. We found a large diaphragmatic hernia on the left side during evaluation, which causes intra-abdominal organ shift to the left hemithorax. The patient underwent surgery for diaphragmatic herniorrhaphy. Conclusion: Congenital diaphragmatic Bochdaleck hernias are rare and are associated with nonspecific symptoms in adults. They may be symptom-free during the patient's life as in our case. It is necessary to investigate more cases and long-term follow-ups of patients, to improve the diagnosis and treatment of these patients.