A 64-year-old man presented with symptoms indicative of superior vena cava syndrome. Imaging work-up revealed an obstructing right atrial mass, which was subsequently excised and diagnosed as primary cardiac lymphoma. Post-surgery, the patient showed significant clinical improvement started on a chemotherapy regimen complete remission at 1 year.

During the routine dissection of a cadaver a left superior vena cava was noticed passing into the coronary sinus. This condition is not uncommon, but further dissection showed that the coronary sinus ended 1 cm. from the wall of the right atrium. Inspection of the right atrium showed no opening for the coronary sinus and the wall between the opening for the inferior vena cava and the tricuspid ...