IntroductionWe present a case of a gentleman with atypical headache symptoms clinically diagnosed as giant cell arteritis (GCA) and initiated on high dose oral steroids. He subsequently developed progressive neurological deficit including bilateral internuclear ophthalmoplegia (INO), as well as third cranial nerve involvement despite above treatment. He received IV methylprednisolone and demonstrated clinical response, temporal artery biopsy confirmed histological evidence of GCA. The nature of his presentation was atypical of cranial giant cell arteritis. Few reported cases describe INO in the context of GCA, with bilateral manifestation being rarer, especially with additional third cranial nerve involvement.
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