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Published on: February 8, 2019
Multifocal fibrosclerosis and IgG4-related disease involving the cardiovascular system
Nobukazu Ishizaka1, Aiko Sakamoto, Yasushi Imai
1Department of Cardiology, Osaka Medical College, Takatsuki-shi, Daigaku-machi 2-7, Osaka 569-8686, Japan. ishizaka@poh.osaka-med.ac.jp
Insights
Multifocal fibrosclerosis can affect the cardiovascular system, presenting as various inflammatory conditions. Some cases are linked to immunoglobulin-G4-related sclerosing disease (IgG4-SD), requiring further research.
Area of Science:
- Cardiovascular Medicine
- Immunology
- Pathology
Background:
- Multifocal fibrosclerosis can involve the cardiovascular system, manifesting as idiopathic retroperitoneal fibrosis, inflammatory aortic aneurysm, periarteritis, and pericarditis.
- These conditions, sometimes occurring together, can be collectively termed 'chronic periaortitis' when involving the abdominal aorta and retroperitoneum.
- Advances in imaging have increased the diagnosis of cardiovascular fibrosclerosis.
Purpose of the Study:
- To review the current understanding of multifocal fibrosclerosis in the cardiovascular system.
- To explore the association between cardiovascular fibrosclerosis and immunoglobulin-G4-related sclerosing disease (IgG4-SD).
- To identify areas requiring future investigation.
Main Methods:
- Literature review of multifocal fibrosclerosis and IgG4-SD.
- Synthesis of findings on cardiovascular manifestations.
- Analysis of histopathological similarities between IgG4-SD and fibrosclerosis.
Main Results:
- Cardiovascular fibrosclerosis encompasses conditions like chronic periaortitis.
- A subset of cardiovascular fibrosclerosis cases shows a link to IgG4-SD.
- IgG4-SD is characterized by fibrosclerosis and specific immune cell infiltration, consistent across organs.
Conclusions:
- Multifocal cardiovascular fibrosclerosis is an increasingly recognized entity.
- The association with IgG4-SD highlights a potential autoimmune or inflammatory pathway.
- Further research is needed to fully elucidate the relationship and clinical implications.
Abstract:
The cardiovascular system may be involved as a target organ of multifocal fibrosclerosis, which may manifest as idiopathic retroperitoneal fibrosis, inflammatory aortic aneurysm, inflammatory periarteritis, and inflammatory pericarditis. These pathological conditions can sometimes occur concomitantly. Idiopathic retroperitoneal fibrosis and inflammatory abdominal aortic aneurysm are both characterized by the presence of fibro-inflammatory tissue around the abdominal aorta expanding into the surrounding retroperitoneal structures, and together they may be termed 'chronic periaortitis'. Cardiovascular fibrosclerosis has become non-uncommonly encountered condition since imaging modalities have made its diagnosis more feasible. In addition, recent studies have demonstrated that a certain fraction, but not all, of cardiovascular fibrosclerosis may have a link with immunoglobulin-G4 (IgG4)-related sclerosing disease (IgG4-SD). IgG4-SD is histologically characterized by dense fibrosclerosis and infiltration of lymphocytes and IgG4-positive plasma cells, and these histopathologic findings seem to be essentially similar regardless of the organs involved. In this mini review, we summarize what is known so far about multifocal fibrosclerosis of the cardiovascular system and its association with IgG4-SD, and what remains to be clarified in future investigations.
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