From: Spontaneous cervicocephalic arterial dissection with headache and neck pain as the only symptom
Definite case | |
Satisfying any of diagnostic criteria I, II, or III below | |
I. | Either intimal flap or double lumen visible on cerebral angiogram |
II. | Either intimal flap or double lumen visible on MRI or MRA (tomogram image). Handled identically if the transverse image on 3D-CTA and ultrasound examination is sufficiently delineated, and a clear intimal flap and double lumen are visible |
III. | If any of findings IV, V, or VI are seen, and a clear change is seen in the findings over time with repeated imaging examinations. Limited to cases in which a cause other than dissection can be ruled out |
Suspected case | |
Satisfying any of diagnostic criteria IV, V, or VI below | |
IV. | Non-specific findings suggesting arterial dissection (pearl sign, tapered occlusion) are visible on cerebral angiogram other than the findings in I above |
V. | Findings are visible on MRA angiogram that appear to correspond to the pearl and string sign, string sign, or tapered occlusion on cerebral angiogram |
VI. | Intense signal suggesting intramural hematoma visible on MRI T1-weighted image |