To the Editor:
We appreciate the comments from Milchert, et al1 on our study evaluating the involvement of femoropopliteal arteries in giant cell arteritis (GCA)2. In their letter, they describe 2 cases with different clinical manifestations of extracranial GCA, including 1 patient with suspected vasculitis of the lower extremities. They discuss the difficulties in discriminating between vasculitis and arteriosclerosis in clinical practice.
Detection of a homogenous, hypoechogenic, circumferential vessel wall thickening by color duplex sonography (CDS) has been shown to be specific for …