A rare coronary anomaly: the right coronary artery originating from the left anterior descending artery

Coronary artery anomalies are structural variations which are usually detected incidentally as a result of coronary angiographies. Clinically, they are usually asymptomatic. The prevalence of the coronary anomalies was detected to be 1.3% in patients undergoing coronary angiography. Among coronary artery anomalies; the anomaly in which all coronary arteries are originating from a single coronary is called the single coronary artery (SCA). Among the single coronary artery anomalies; the right coronary artery (RCA) originating from the left anterior descending artery (LAD) is an even rarer condition with a rate around 0.009%. In this anomaly, while the RCA usually originates from the left main coronary artery (LMCA), it may also rarely be seen as a branch of the LAD.