Concealed pheochromocytoma presenting as recurrent acute coronary syndrome with STEMI: Case report of a patient with hyperthyroidism

Pheochromocytomas are rare, primarily benign tumors of chromaffin cells that secrete catecholamines. Although they are curable when diagnosed early, they can be fatal if undiagnosed or mistreated. Pheochromocytoma causing acute myocardial infarction has been reported as presenting with either unstable angina with EKG changes and/or non-ST elevation myocardial infarction (NSTEMI), but there have been no reported cases of pheochromocytoma presenting as acute ST segment elevation myocardial infarction (STEMI) in the setting of hyperthyroidism. Herein, we report a 44-year-old female patient with underlying pheochromocytoma who presented with multiple episodes of acute coronary syndrome (ACS) including an episode of STEMI in the setting of thyroid storm with no obstructive coronary artery disease (CAD).