Extra-Cranial Involvement in Giant Cell Arteritis

Abstract

Recent advances in imaging studies and treatment approaches have greatly improved our knowledge about Giant Cell Arteritis (GCA). Previously thought of as a predominantly cranial disease, we now know that GCA is a systemic disease that may involve other medium and large vessel territories. Several imaging studies have shown that between 30 and 70% of patients with GCA present with large-vessel vasculitis. Moreover, a significant proportion of patients present large-vessel disease in the absence of cranial involvement. Extra-cranial disease also poses management challenges as these patients may have a more refractory-relapsing disease course and need additional therapies. Aortic dilation and aneurysms are well-described late complications of GCA involving the large artery territories. In this chapter, we discuss the clinical picture of extra-cranial involvement in GCA, focusing on improved diagnostic protocols and suitable treatment strategies.