What are immune complex small-vessel vasculitis?

Antiglomerular basement membrane disease (affect glomerular capillaries with basement membrane, lung involvement causes pulmonary hemorrhage, renal causes glomerulonephritis with necorsis) Cryoglobinemic vasculitis (presence of cryoglubulin serum protein precipitate in the cold dissolve in warm, most often due to HepC, deposit in arteries, capillaries and venules usually skin, glomeruli, peripheral nerves) IgA vasculitis/Henoch-Schonlein purpura (tissue deposit IgA complex in small vessels, typically skin, GI and arthritis) Hypocomplementemic urticarial vasculitis/anti-C1q vasculitis (with urticaria and hypocomplementemia, and predominantly affects small vessels. Glomerulonephritis, arthritis, obstructive pulmonary disease, and ocular inflammation may also be observed)