Which of the following is not an etiology of carotid dissection?

Carotid dissection is a condition where a tear occurs in the carotid artery wall, which can lead to serious complications such as stroke. The primary etiologies associated with carotid dissection include trauma, hypertension, and connective tissue disorders, such as Marfan syndrome.

Trauma can contribute to carotid dissection as physical injury may create tears in the arterial walls. Hypertension is a significant risk factor because prolonged high blood pressure can weaken the arterial walls, making them more susceptible to tears. Marfan syndrome is a genetic disorder affecting connective tissue, leading to vascular weaknesses, including those in the carotid arteries.

Diabetes, while a serious chronic condition often associated with vascular complications, is not commonly linked with the mechanical and structural changes that lead to carotid dissection. Instead, diabetes more typically contributes to atherosclerosis and other types of vascular disease, rather than specific arterial dissections. Therefore, it is not considered an etiology of carotid dissection.