necrotizing vasculitide

Necrotizing vasculitides are a group of disorders characterized by inflammation and necrosis (tissue death) in segments of blood vessels, primarily small and medium-sized arteries. The specific clinical symptoms depend on which blood vessels are affected and the severity of the inflammation.1

While a single cause isn't identified for all necrotizing vasculitides, some cases are linked to the deposition of immune complexes (antigen-antibody combinations) in blood vessel walls. This can occur in conditions like serum sickness or potentially from viral infections, such as hepatitis B. Examples include polyarteritis nodosa, which can affect the kidneys, and Wegener granulomatosis, involving the respiratory tract and kidneys. Takayasu arteritis and giant-cell arteritis are other forms that affect larger arteries.1

It is important to distinguish this from necrotizing fasciitis, a severe bacterial infection of soft tissues that can rapidly destroy tissue and lead to organ failure and death.2