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[Vasculitis. New nomenclature of the Chapel Hill consensus conference 2012]
1Konsultations- und Referenzzentrum für Vaskulitisdiagnostik, Institut für Pathologie, Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Ratzeburger Allee 160, 23538, Lübeck, Deutschland, konstanze.holl-ulrich@uksh.de.
Insights
The 2012 Chapel Hill Consensus Conference (CHCC) nomenclature updates vasculitis classification based on etiopathology and vessel characteristics. It distinguishes anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitides and replaces eponyms with systematic names for better clarity.
Area of Science:
- Rheumatology and Pathology
- Immunology
- Histopathology
Background:
- Advances in understanding vasculitis etiopathology and disease courses.
- The need for updated classification reflecting current scientific knowledge.
- Limitations of previous nomenclature systems.
Framework:
- The revised Chapel Hill Consensus Conference (CHCC) 2012 nomenclature.
- Classification based on etiopathology, vessel size, and inflammation type.
- Distinction between ANCA-associated vasculitides and immune complex small vessel vasculitis.
Implementation:
- Replacement of eponyms with systematic names (e.g., granulomatosis with polyangiitis).
- Inclusion of clinically significant but less recognized vasculitis types.
- Focus on histopathological relevance and updated diagnostic criteria.
Implications:
- Improved diagnostic accuracy and classification of vasculitis.
- Enhanced understanding of disease mechanisms and clinical presentations.
- Guidance for histopathologists in identifying and classifying vasculitis subtypes.
Abstract:
In recent years, many advances have been made in our understanding of vasculitis etiopathology as well as of different disease courses. The revised Chapel Hill Consensus Conference (CHCC) 2012 nomenclature reflects current knowledge about etiopathology, in addition to the descriptive principles of vessel size and type of inflammation. Anti-neutrophil cyptoplasmic antibody (ANCA)-associated vasculitides have been classified as a separate group, as opposed to immune complex small vessel vasculitis. In cases where consensus was achieved, eponyms have been replaced by systematic names, such as granulomatosis with polyangiitis (Wegener's) or eosinophilic granulomatosis with polyangiitis (Churg-Strauss syndrome). Moreover, clinically important but less well-known types of vasculitis have now been included in the CHCC nomenclature. This article presents the changes, focussing on those types that are relevant to the histopathologist, and summarizes the results of important new articles on morphology and clinical picture of vasculitis.
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