Our quantitative histological assessment corresponded to these classical histological GCA features in the TAB-positive GCA group, revealing abundant numbers of CD3+, CD4+, CD8+, NFATC+ and CD68+ cells, and a variable number of CD20+ B lymphocytes, MGCs and eosinophil granulocytes, compared to TAB-negative GCA arteries, where small numbers of CD3+, CD4+ and CD68+ cells were focally segmentally detectable by immunohistochemistry only. The gene discussed is CD4; the disease is temporal arteritis.