Fig. 2From: A primary pulmonary artery sarcoma masquerading pulmonary embolism: a case report and literature reviewA, B Preoperative echocardiography: a large irregular hypoechoic mass detected within the main pulmonary artery. No blood flow revealed in the mass. C, D Contrast-enhanced echocardiography: the contrast agent was unevenly filling within the massBack to article page