Table 4.

Aneurysmal wall inflammatory cell invasion score (adapted from Kataoka et al. [41])

Score	Histological observations
0	Presence of few macrophages. Absence of positive staining for cathepsin G. Cathepsin D signal can be observed
1	Presence of macrophages. Cathepsin D is detected
2	Presence of macrophage clusters. Strong signal for cathepsin D. Scattered smooths muscle cells and disrupted collagen layer. Presence of leukocytes
3	Diffuse invasion of macrophages in the aneurysmal wall. Strong signal for cathepsin D may be present. Presence of leukocytes and eventual signal for cathepsin G