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He recognised the role of allergy in the pathogenesis of Henoch-Schonlein purpura, hence the understanding of the allergic component in HSP. [34] William Osler is also the first to recognise the underlying allergic mechanism of HSP. [35] In 2012, the International Chapel Hill Consensus Conference Nomenclature of Vasculitides renamed HSP IgA ...
Cryofibrinogenemia refers to a condition classified as a fibrinogen disorder in which a person's blood plasma is allowed to cool substantially (i.e. from its normal temperature of 37 °C to the near-freezing temperature of 4 °C), causing the (reversible) precipitation of a complex containing fibrinogen, fibrin, fibronectin, and, occasionally, small amounts of fibrin split products, albumin ...
Immune complex glomerulonephritis, as seen in Henoch-Schönlein purpura; this is an example of IgA involvement in a nephropathy. The reaction can take hours, days, or even weeks to develop, depending on whether or not there is immunological memory of the precipitating antigen. Typically, clinical features emerge a week following initial antigen ...
In cases where a cause can be determined, medications and infectious pathogens are most common in adults, while IgA vasculitis (Henoch–Schönlein purpura) frequently affects children. [6] Other etiologies include autoimmune conditions and malignancies, usually hematologic (related to the blood). [5] [6]
Henoch–Schönlein purpura (HSP) - Often considered a systemic form of IgA nephropathy, Henoch–Schönlein purpura (HSP) is a systemic small-vessel vasculitis that is characterized by deposition of IgA antibody immune complexes in different key areas throughout the body.
IgA nephropathy (IgAN), also known as Berger's disease (/ b ɛər ˈ ʒ eɪ /) (and variations), or synpharyngitic glomerulonephritis, is a disease of the kidney (or nephropathy) and the immune system; specifically it is a form of glomerulonephritis or an inflammation of the glomeruli of the kidney.
Inflammation-induced damage to the skin's blood vessels causes palpable purpura. Palpable purpura is the clinical manifestation of leukocytoclastic vasculitis, which can be idiopathic or linked to sepsis, reactions to drugs, connective tissue diseases, cryoglobulinemia, hepatitis C or B infection, or underlying cancers
The following revised diagnostic criteria for essential thrombocythemia were proposed in 2005. [13] The diagnosis requires the presence of both A criteria together with B3 to B6, or of criterion A1 together with B1 to B6. [14] The criteria are as follows: [14] A1. Platelet count > 400 × 10 3 /μL for at least 2 months. A2. Acquired V617F JAK2 ...