- hypersensitivity to an antigenic stimulus, such as a drug, infectious agent, or exogenous or endogenous protein; all disorders in this group involve the small vessels. Types include varieties of Henoch-SchÑ†nlein purpura and serum sickness, as well as urticarial v. Called also allergic or leukocytoclastic v. and hypersensitivity or leukocytoclastic angiitis. 2. cutaneous lymphcytoclastic vasculitis, so called because of the hypersensitivity reaction sometimes, but not always, seen.
Medical dictionary. 2011.
Look at other dictionaries:
Hypersensitivity vasculitis — Infobox Disease Name = PAGENAME Caption = DiseasesDB = 7423 ICD10 = ICD10|M|31|0|m|30 ICD9 = ICD9|446.2 ICDO = OMIM = MedlinePlus = eMedicineSubj = med eMedicineTopic = 2930 MeshID = D018366 Hypersensitivity vasculitis (or hypersensitivity… … Wikipedia
Hypersensitivity pneumonitis — Classification and external resources Micrograph of hypersensitivity pneumonitis. Lung biopsy. Trichrome stain … Wikipedia
Vasculitis — is a general term for a group of uncommon diseases which feature inflammation of the blood vessels. The blood vessels of the body are referred to as the vascular system. The blood vessels are composed of arteries that pass oxygen rich blood to… … Medical dictionary
Vasculitis — Classification and external resources Micrograph showing a vasculitis (Churg Strauss syndrome). H E stain … Wikipedia
hypersensitivity angiitis — see under vasculitis … Medical dictionary
cutaneous leukocytoclastic vasculitis — vasculitis affecting the small vessels of the skin, with infiltration by polymorphonuclear leukocytes, red blood cell extravasation, and dermal necrosis, manifesting first as a rash on the lower extremity or buttocks, usually accompanied by a… … Medical dictionary
Systemic vasculitis — Classification and external resources ICD 10 M30 M31 ICD 9 … Wikipedia
Cutaneous small-vessel vasculitis — (also known as Cutaneous leukocytoclastic angiitis,  Cutaneous leukocytoclastic vasculitis,  Cutaneous necrotizing venulitis,  and Hypersensitivity angiitis ) is inflammation of small blood vessels (usually post capillary venules in… … Wikipedia
Type IV hypersensitivity — Classification and external resources MeSH D006968 Type IV hypersensitivity is often called delayed type hypersensitivity as the reaction takes two to three days to develop. Unlike the other types, it is not antibody mediated but rather is a type … Wikipedia
systemic vasculitis — systemic necrotizing vasculitis any of a group of disorders characterized by inflammation and necrosis of blood vessels, occurring in a broad spectrum of cutaneous and systemic disorders. It includes Churg Strauss syndrome, polyarteritis nodosa,… … Medical dictionary