However, the expression of TIGIT (p = 1.28e−02), PDCD1 (p = 2.92e−02), CTLA4 (p = 2.50e−05), and SIGLEC15 (p = 2.81e−04) were down-regulated in AAA neck (Fig. 4A,B). This evidence concerns the gene PDCD1 and triple-A syndrome.