Inflamed blood vessels by ischemic, inflammatory and immune mechanisms.
Most cases are related to systemic disorders that affect multiple organ systems.
Each of the vasculitis diseases is defined by certain patterns of distribution of blood vessel involvement, particular organ involvement, and laboratory test abnormalities.
These diseases are ref2242ed to as vasculitides.
Another term for vasculitis is angiitis.
Can present in older adults with nonspecific symptoms of weakness, and weight loss
Categorized by size of blood vessels: small, medium and large.