Definition:

Polyarteritis nodosa, also known as vasculitis, autoinflammation, immunodeficiency, and hematologic defects syndrome (VAIHS), is a systemic necrotizing vasculitis that affects medium and small muscular arteries. The ensuing tissue ischemia can affect any organ, including the skin, musculoskeletal system, kidneys, gastrointestinal tract, and the cardiovascular and nervous systems. In most cases, onset of the disease occurred during childhood. Polyarteritis nodosa is most often primary. Recessive mutations in the adenosine deaminase 2 (ADA2)-encoding gene CECR1 have been found from patients of this disease.