Syncope caused by pulmonary artery intima sarcoma: a cardiac magnetic resonance imaging-based differentiating diagnosis.

A 17-year old man was referred with Syncope. Echocardiography suggested a mass in the main pulmonary artery. A comprehensive cardiac magnetic resonance was performed. The mass was attached to the intima of the pulmonary artery. The diagnosis of thrombus was excluded. Finally, the mass was resected successfully and pathology confirmed the diagnosis (Fig. 1, Supplementary Videos S1 and S2). Supplementary material (Videos 1 and 2) is available at EJCTS online. Video S1: Axial steady-state free precession cine showed a large mass attached to the intima of the pulmonary main artery which swung during the cardiac cycle. Video S2: Sagittal views showed that the mass consisted of two different characteristic parts located above the pulmonary valve; the pulmonary valve was not affected.