Familial giant cell arteritis

The genetic basis of giant cell arteritis is not fully understood but may play a role in treatment resistance and increased risk of ischaemic complications, including permanent vision loss. We present two of five cases of familial giant cell arteritis (2.5%) among 198 temporal artery biopsy-positive patients seen at a single institution over a 20-year period between 2003 and 2023 to highlight the importance of further genetic studies in this group of patients to improve timely diagnosis, management and detection of patients at greatest risk for ischaemic sequelae.