Right pneumonectomy syndrome presenting as a cardiac arrest in a two-year-old.

Abstract Pneumonectomy syndrome is a rare complication after pneumonectomy with variable onset and presentation. It is characterized by extrinsic airway compression secondary to mediastinal shift. As far as we are aware, we are reporting the first pediatric case of pneumonectomy syndrome presenting as a cardio-pulmonary arrest. A two-year-old boy presented with a cardiac arrest 8 months after his pneumonectomy. He failed extubation twice. A flexible bronchoscopy was then performed which revealed external compression of the left mainstem bronchus. He underwent surgical correction with a prosthetic, thoracic implant. The patient's trachea was subsequently extubated to room air on postoperative day 1. He remains clinically stable at 6 month follow-up. Postpneumonectomy syndrome is a rare but serious complication after pneumonectomy. If the airway compression occurs in conjunction with compromised vena caval return, cardio-pulmonary arrest can occur. Therefore, timely diagnosis and early intervention is required.