Moreover, correlations between MPO and neutrophil elastase were found at all AAA sites (r = 0.87, p = 0.0001; r = 0.82, p = 0.0001; r = 0.85, p = 0.0001; r = 0.84, p = 0.0001, respectively, for thin and thick ILT sections, and AAA wall underlying thin and thick ILT). This evidence concerns the gene MPO and triple-A syndrome.