Doppler echocardiographic diagnosis and follow-up of acquired pulmonary stenosis due to external cardiac compression.

Mediastinal tumors that cause hemodynamic disturbances by compressing the heart are extremely rare. We report the case of a 19-year-old woman who presented right ventricular outflow tract obstruction due to a non-Hodgkin lymphoma. The diagnosis of this complication and its response to chemotherapy can be accurately assessed by transthoracic echocardiography and Doppler.