A 2mm~3mm bulge in the c7 segment of the left internal carotid artery may be an internal carotid aneurysm, or it may be caused by internal carotid arteriosclerosis and other diseases.
1. Internal carotid aneurysm: Internal carotid aneurysm is usually caused by atherosclerosis, infection, trauma and other factors, and the clinical symptoms may be manifested as headache, loss of vision, etc. or no clinical symptoms. Head CTA or head MRI MRA can clearly show the location and size of the aneurysm, but the gold standard for diagnosis is cerebral angiography.
2. Internal carotid atherosclerosis: The common triggering factors of internal carotid atherosclerosis may include age, smoking, high blood pressure, etc., which leads to the early manifestation of internal carotid artery as the thickening of the intima and the intermediate membrane, and the gradual formation of sclerotic plaques. If such patients undergo ultrasound examination of the neck, it may show a 2mm~3mm bulge in the c7 segment of the left internal carotid artery lumen.
There are many other possible causes of a 2mm~3mm bulge in the c7 segment of the left internal carotid artery, so it is recommended that the patient seek medical attention in a timely manner to further consult a specialized doctor.