Fig. 4From: Surgical treatment of syphilitic superficial femoral artery aneurysm: a rare case reportPathology of the excised aneurysmal tissue revealed the proliferation of the vasa vasorum in the adventitia, with sporadic infiltration of inflammatory cells (arrow, a); the fibroplasia in the arterial wall along with the local calcification (arrow, b) and mucoid degeneration (arrow, c)Back to article page