Anomalous origin of the right coronary artery from the left circumflex coronary artery: an extremely rare coronary anomaly.

Isolated single coronary artery is an extremely rare anomaly with an incidence of 0.024% to 0.066% which may be associated with other congenital anomalies. This report describes a 50-year-old woman who was referred with recurrent chest discomfort and was diagnosed with anomalous origin of the right coronary artery from the left circumflex coronary artery.