Zero coronary calcium in the presence of three-vessel and left main coronary artery disease in a Hodgkin lymphoma survivor

摘要

We describe a 45-year-old male survivor of Hodgkin lymphoma, treated with mediastinal radiation therapy, referred for single-photon emission computed tomography (SPECT) myocardial perfusion imaging in combination with coronary artery calcium (CAC) scoring. SPECT demonstrated a reversible moderate-sized lateral perfusion defect, and the CAC score was zero. A calcium score of zero markedly reduces the probability of having coronary artery disease (CAD) and is associated with a very low risk of future cardiovascular events. However, a CAC score of zero does not completely rule out obstructive CAD. In this case, invasive coronary angiography revealed three-vessel CAD with left main involvement. Whether mediastinal radiation therapy in general is associated with CAD without accompanying CAC is yet unclear.