Published online by Cambridge University Press: 29 June 2023
We describe a rare case of acute pulmonary artery thromboembolism in a 17-year-old male patient who presented to our emergency department following a syncopal episode. A chest radiograph showed a convex pulmonic cone and an increased cardiothoracic index, and two-dimensional echocardiogram suggested near-occlusion of both pulmonary arterial branches. Multi-slice pulmonary angio-tomography revealed massive thrombosis of the pulmonary artery. He was treated with systemic anticoagulation and subsequently required surgical thrombectomy, with favourable early outcome. Although the cause of the thromboembolism remains unproven, we discuss possible etiologies.