[Platypnea-orthodeoxia syndrome : an insightful clinical observation].

We report the case of a patient admitted to the Intensive Care Unit with dyspnea and refractory hypoxemia after surgical resection of a benign bronchogenic cyst. Etiological research approach excluded conventional postoperative hypoxemia causes. Thereafter a platypnea-orthodeoxia syndrome has been diagnosed. Additional tests will demonstrate the existence of a patent foramen ovale. This diagnosis was suitable with the patient's syndrome and was eligible for percutaneous closure procedure allowing immediate resolution of symptoms and confirming the diagnosis.