Cardiac Inflammatory Myofibroblastic Tumor Causing Pulmonary Artery Obstruction: A Rare Case Report

Inflammatory myofibroblastic tumor (IMT) is a rare soft tissue tumor of the heart. In the literature, cardiac IMT is often described as an endocardial-based cavitary mass originating from the right side of the heart in infants and adolescents. In this article, we present a 5-year-old boy with a rare cardiac IMT who had no complaints and was diagnosed with murmur during his routine examination. Transthoracic echocardiography showed a homogeneous polypoid mass originating from the pulmonary valve, extending into the main pulmonary artery during systole and causing obstruction of the pulmonary artery and right ventricular outflow tract. Surgical resection of the tumor was performed successfully. There was no tumor recurrence in the control echocardiography at the postoperative first month.