Single left coronary artery with the right coronary artery arising from the mid-portion of the left anterior descending artery. Diagnosis with MDCT.

Single coronary artery is a very rare entity. We describe a very unusual subtype of this anomaly in which the right coronary artery arises from the mid-portion of the left anterior descending artery. MDCT allowed diagnosis of this non pathogenic variant and excluded any significant coronary stenosis.