Pneumoperitoneum and Chilaiditi syndrome: navigating a diagnostic conundrum

Chilaiditi sign represents a rare condition marked by the interposition of the bowel between the diaphragm and liver, mimicking pneumoperitoneum on radiological imaging. The syndrome manifests with gastrointestinal symptoms and is often confused with more serious conditions. This case report presents a rare instance of Chilaiditi syndrome, initially misdiagnosed as pneumoperitoneum based on chest X-ray findings. The patient, a 61-year-old woman, arrived at the emergency department complaining of acute epigastric pain. Initial tests, including a chest X-ray, suggested pneumoperitoneum, but a subsequent contrast-enhanced abdominal CT-scan revealed the interposition of the right colon between the liver and diaphragm, characteristic of Chilaiditi sign. The patient's symptoms, including abdominal pain and diarrhea, were consistent with Chilaiditi syndrome. The patient was treated successfully with intravenous antibiotics and fluids, showing significant improvement within 48 hours. The report highlights the importance of differentiating Chilaiditi syndrome from other acute abdominal conditions to avoid unnecessary surgical intervention.