Cardiophrenic Angle Opacity: A Diagnostic Dilemma

Cardiophrenic angle opacity on chest radiograph has varied differential diagnoses including pericardial fat pad, pericardial fat necrosis, mediastinal tumours, pericardial cyst, diaphragmatic hernia, and lymphadenopathy. We present two cases with cardiophrenic angle opacities on chest radiograph in view of their unusual presenting features and the diagnostic dilemma they put forth. Despite the variations in their presentation and clinical course, both were diagnosed as cases of pericardial cyst.