KD autopsies uncovered the presence of myofibroblast-like cells infiltrated into the artery walls, and these myofibroblast-like cells are responsible for aneurysm formation via secreting IL-17, promoting the release of IL-6, granulocyte-macrophage colony-stimulating factor (GM-CSF), and vascular endothelial growth factor (VEGF), and recruitment of neutrophils, CD8+T cells and CD86+ M1 macrophages [14]. Here, VEGFA is linked to aneurysm.