The percentage of α‐SMA+ (red colour)/p‐p53+ (green colour) double‐positive cells (the number of α‐SMA+/p‐p53+ double‐positive cells/all DAPI (blue colour) positive cells) had increased fivefold in tissue from AAA patients compared with that of control donors (Figure 1D). The gene discussed is TP53; the disease is triple-A syndrome.