"Arterial dissection results from a tear in the tunica intima or vasa vasorum causing blood to enter the tunica media resulting in separation of the vessel wall and creation of a false lumen 16. Haematoma expansion towards the tunica adventitia can cause subadventitial dissection and may be accompanied by dissecting pseudoaneurysm or towards the intima resulting in subintimal dissection."
"classical appearance: narrowed eccentric lumen surrounded by a crescent-shaped mural thrombus and thin annular enhancement (vasa vasorum enhancement in the adventitia)"
"When cervical internal carotid artery is clinically suspected (such as in cases of carotid territory ischaemia or neck trauma), the appropriate MRI protocol includes MRA of the neck to evaluate the lumen and axial fat-suppressed T1-weighted images (T1 FS) to evaluate for (subacute) intramural haematoma. However, when dissection is not suspected and the MRI protocol is not tailored accordingly, subpetrous internal carotid artery dissection with intramural haematoma can usually still be detected on routine brain MRI sequences including DWI 30."
"T1 FS, T2, and DWI: high signal crescent sign indicating intramural haematoma"
"T1 FS, T2, and DWI: high signal crescent sign indicating intramural haematoma"
"T1 FS, T2, and DWI: high signal crescent sign indicating intramural haematoma"
Expected headings
"Associations"
"Complications"
"connective tissue disorder, e.g. Ehlers-Danlos syndrome, Marfan syndrome, osteogenesis imperfecta, Loeys-Dietz syndrome, fibromuscular dysplasia 23-25,33"
"ipsilateral cranial neuropathies (e.g. Collet-Sicard syndrome)"