Echocardiographic findings in a case of acquired pulmonic stenosis from extrinsic compression by a mediastinal cyst.

A peculiar echocardiographic pattern was recorded in a case of cystic teratoma of the left anterior and upper mediastinum, causing a mild stenosis at the pulmonary valve level. The usefulness of echocardiography in the evaluation of anterior mediastinal masses as they distort normal cardiac anatomy is discussed.