[Right ventricular inflow tract obstruction in primary non-Hodgkin lymphoma of the heart].

An unusual case of non-Hodgkin lymphoma (centroblastic B-cell type) is described presenting with severe tricuspid stenosis due to a large right atrial intracavitary tumor mass obstructing the tricuspid orifice. The clinical picture of cardiogenic shock was relieved by surgical removal of the greater part of the tumor mass from the right atrium.