<unk>  (CSVV), also known as hypersensitivity vasculitis,<unk>  leukocytoclastic vasculitis, hypersensitivity angiitis,<unk>  leukocytoclastic angiitis,<unk>  necrotizing vasculitis and<unk>  necrotizing venulitis, is inflammation of small blood vessels (usually post-capillary venules in the dermis), characterized by palpable purpura. It is the most common vasculitis seen in clinical practice. "Leukocytoclastic" refers to the damage caused by nuclear debris from infiltrating neutrophils in and around the vessels.
Cutaneous small-vessel vasculitis
Livedoid vasculitis
Urticarial vasculitis
Systemic vasculitis
Acute cutaneous lupus erythematosus
Bullous small vessel vasculitis
Subacute cutaneous lupus erythematosus
Poikiloderma vasculare atrophicans