At mRNA level, the relative expression of p57kip2 was 6.985 ± 1.138 and 6.592 ± 1.244 in GCA and its adjacent non-cancerous tissues, respectively; while the relative expression of cyclinD1 was 6.389 ± 1.154 and 6.980 ± 1.286 in GCA and its adjacent non-cancerous tissues, respectively. The gene discussed is CDKN1C; the disease is temporal arteritis.