Fig. 2

Dendrogram of the unsupervised hierarchical cluster analysis with Ward’s method in patients with EOLVV. A, B Separate dendrograms of patients who were HLA-B52-positive who had EOLVV and the HLA-B52-negative ones. A The red, purple, and green lines represent patients who had UEOLVV without PMR, patients who had UEOLVV with PMR, and patients with LV-GCA, respectively. B The red line represents patients who had UEOLVV without PMR, and blue line represents patients who had UEOLVV with PMR or patients with LV-GCA. LVV with GCA features was defined as EOLVV with PMR and/or STA involvement. EOLVV, elderly onset large-vessel vasculitis; GCA, giant cell arteritis; HLA, human leucocyte antigen; LV-GCA, large-vessel GCA; LVV, large-vessel vasculitis; PMR, polymyalgia rheumatica; STA, superficial temporal artery; UEOLVV, unclassified EOLVV