High-resolution MRI demonstrates signal abnormalities of the 3rd cranial nerve in giant cell arteritis patients with 3rd cranial nerve impairment

ConclusionsHR MRI had excellent diagnostic sensitivity and specificity when detecting signal abnormalities of the 3rd CN in GCA patients presenting with 3rd CN impairment.Key Points•Third cranial nerve enhancement was detected in all patients with 3rd cranial nerve impairment except for one with transient diplopia.•The “check mark sign” might be useful to identify 3rd cranial nerve signal abnormalities in the orbital apex.•No signal abnormalities of the 4th or 6th cranial nerves could be detected on high-resolution MRI.
Source: European Radiology - Category: Radiology Source Type: research