Isolated inferior thyroidal artery vasculitis: A rare cause of neck pain.

Vasculitis is the inflammatory changes in vessels of any size that usually have a systemic involvement with a quite variable clinical presentation affecting various organs. Although systemic presentation is more common, in some cases localized inflammation of vasculature of a single organ or limited branches of aorta are reported. Here we present, an isolated vasculitis of bilateral inferior thyroidal arteries in a female patient aged 49 years, who presented with neck pain and was diagnosed with ultrasonography and computed tomographic angiography. The clinical and imaging findings were managed successfully with glucocorticoid induction and addition of methotrexate to the treatment. Localized forms of vasculitis are rarer and the limited size of the affected area makes diagnostic investigations and management more complicated. Non-invasive imaging modalities rather than conventional angiography provide useful information in a safer and easier way. Isolated vasculitis of thyroidal arteries is an extremely uncommon site and should be excluded in case of unexplained neck pain, even in the presence of normal laboratory examinations, probably because of the size of the involved vessels.