Fig. 2
From: Thoracoscopic approach to the resection of idiopathic azygos vein aneurysm: a case report
A: The removal tissues of saccular azygos vein aneurysm was performed. B, C: At low magnification, the vascular walls of the hemangioma are distorted and of varying thickness, with the black arrow indicating the thinness of the muscular wall. D: Focal fatty vacuoles are seen in the vessel wall (red arrow). E: A large number of red blood cells (white arrow) are seen in this partially dilated lumen, and the vessel wall is lined with short spindle endothelial cells