A 58-year-old male presented with back pain. On physical examination, his heart rate was 98 beats/min, blood pressure was 178/86 mmHg, his pulses were equal, and there were no murmurs.A computed tomography scan revealed an isolated innominate artery dissection with a maximum diameter of 1.6 cm (Figure 1). The patient was treated medically with strict blood pressure control and pain medication. At 6-month follow-up, he remains asymptomatic and the innominate dissection is unchanged (Figure 2). Spontaneous dissection of the innominate artery is rare.