{'fraction_non_alphanumeric': 0.03274087932647334, 'fraction_numerical': 0.0205799812909261, 'mean_word_length': 5.149425287356322, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Diffusion MR Imaging of the Optic Nerve in a Patient with Giant-Cell Arteritis and Vertebral Artery Vasculitis

ing vasculitis. Such concurrent ischemic manifestations are not exceptional in GCA. In this regard, a populationbased study emphasized that vertebrobasilar strokes are more common than those involving the carotid territory in patients with biopsy-proven GCA [1] . In addition, permanent visual loss due to vasculitic involvement of arteries derived from the ophthalmic artery was the best predictor of strokes in patients with GCA [1] . An 80-year-old woman was admitted for evaluation of an acute right monocular blindness. A diagnosis of central retinal artery occlusion secondary to biopsy-confirmed giant cell arteritis (GCA) was made. High-resolution diffusion-weighted images (HR-DWI) performed at admission revealed recent ischemic injuries in the left occipital lobe and in the right optic nerve (fig. 1, 2). Duplex ultrasound of the vertebral arteries suggested an underlyReceived: May 4, 2011 Accepted: June 1, 2011 Published online: July 21, 2011