Ga-67 Imaging of “Cervical Collar” Sign in Periarteritis Nodosa

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A 30-month-old girl was evaluated with Ga-67 imaging to identify foci of abnormal inflammation. Biopsy of a cutaneous lesion demonstrated manifestations of periarteritis nodosa, which included polymorphic exanthemata- purpuric, urticarial, and multiform in character. There was also severe subcutaneous hemorrhage resulting from necrotizing arteritis. Ga-67 imaging shows the only abnormality located to the posterior neck muscles at sites of cutaneous involvement. Other areas were normal.

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