Behcet’s disease is virtually unparalleled among the vasculitides in its ability to involve blood vessels of nearly all sizes and types, ranging from small arteries to large ones, and involving veins too. Because of the diversity of blood vessels it affects, manifestations of Behcet’s may occur at many sites throughout the body.
https://www.hopkinsvasculitis.org/types-vasculitis/behcets-disease/

