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IgG4-Related and Inflammatory Diseases
Research Guide
What is IgG4-Related and Inflammatory Diseases?
IgG4-related disease is a systemic condition characterized by elevated serum IgG4 concentrations, tumefaction, and tissue infiltration by IgG4-positive plasma cells, affecting multiple organs including the pancreas, biliary tract, and salivary glands.
The field encompasses 29,725 works on the diagnosis and management of IgG4-related disease, including autoimmune pancreatitis, inflammatory myofibroblastic tumor, and sclerosing cholangitis. Key aspects include diagnostic criteria, pathological features, clinical profiles, and therapies such as rituximab. "High Serum IgG4 Concentrations in Patients with Sclerosing Pancreatitis" (Hamano et al., 2001) identified elevated IgG4 levels as a distinguishing marker for sclerosing pancreatitis.
Topic Hierarchy
Research Sub-Topics
Diagnostic Criteria for IgG4-Related Disease
This sub-topic develops and refines comprehensive criteria combining serology, histology, and imaging for IgG4-RD diagnosis. Researchers validate criteria through multicenter cohorts and consensus guidelines.
Pathology of IgG4-Related Disease
This sub-topic characterizes histopathological features like storiform fibrosis, obliterative phlebitis, and IgG4+ plasma cell infiltration. Researchers correlate pathology with organ-specific manifestations.
Autoimmune Pancreatitis Type 1
This sub-topic focuses on clinical, radiological, and serological features of type 1 AIP as the pancreatic manifestation of IgG4-RD. Researchers study response to steroids and relapse predictors.
IgG4-Related Sclerosing Cholangitis
This sub-topic investigates biliary strictures, liver involvement, and distinction from primary sclerosing cholangitis in IgG4-RD. Researchers evaluate steroid responsiveness and surveillance strategies.
Rituximab Therapy in IgG4-Related Disease
This sub-topic assesses B-cell depletion with rituximab for steroid-refractory IgG4-RD, monitoring relapse and long-term efficacy. Researchers conduct prospective trials on dosing and biomarkers.
Why It Matters
IgG4-related disease impacts diagnosis and treatment in rheumatology and gastroenterology by enabling differentiation of fibroinflammatory conditions from malignancies. Hamano et al. (2001) showed high serum IgG4 concentrations distinguish sclerosing pancreatitis from other pancreatic or biliary diseases, with their paper garnering 2688 citations. Stone et al. (2012) outlined management approaches for this multi-organ autoimmune disorder, while Umehara et al. (2012) provided comprehensive diagnostic criteria useful for general physicians, facilitating earlier rituximab therapy and reducing unnecessary surgeries.
Reading Guide
Where to Start
"IgG4-Related Disease" by Stone et al. (2012) first, as it reviews the spectrum, diagnostic status, and management for diverse organ involvement, providing a foundational clinical overview.
Key Papers Explained
Hamano et al. (2001) first identified high serum IgG4 in sclerosing pancreatitis, establishing a key biomarker cited 2688 times. Stone et al. (2012) and Kamisawa et al. (2003) expanded this to a systemic entity, with Stone et al. reviewing diagnostics (2528 citations). Umehara et al. (2012) and Deshpande et al. (2012) built consensus on criteria and pathology (1649 and 2497 citations), while Shimosegawa et al. (2011) refined autoimmune pancreatitis subtypes linking to IgG4.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Recent works reinforce 2011-2012 criteria for IgG4-RD and autoimmune pancreatitis, with no new preprints or news in the last 12 months indicating stable frontiers in diagnostics and pathology consensus.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | High Serum IgG4 Concentrations in Patients with Sclerosing Pan... | 2001 | New England Journal of... | 2.7K | ✓ |
| 2 | IgG4-Related Disease | 2012 | New England Journal of... | 2.5K | ✕ |
| 3 | Consensus statement on the pathology of IgG4-related disease | 2012 | Modern Pathology | 2.5K | ✓ |
| 4 | Comprehensive diagnostic criteria for IgG4-related disease (Ig... | 2012 | Modern Rheumatology | 1.6K | ✕ |
| 5 | Extrapulmonary Inflammatory Myofibroblastic Tumor (Inflammator... | 1995 | The American Journal o... | 1.6K | ✕ |
| 6 | Comprehensive diagnostic criteria for IgG4-related disease (Ig... | 2012 | Modern Rheumatology | 1.5K | ✕ |
| 7 | International Consensus Diagnostic Criteria for Autoimmune Pan... | 2011 | Pancreas | 1.5K | ✕ |
| 8 | A new clinicopathological entity of IgG4-related autoimmune di... | 2003 | Journal of Gastroenter... | 1.4K | ✕ |
| 9 | Chronic pancreatitis caused by an autoimmune abnormality | 1995 | Digestive Diseases and... | 1.4K | ✕ |
| 10 | IgG4-related disease | 2014 | The Lancet | 1.2K | ✕ |
Frequently Asked Questions
What defines IgG4-related disease?
IgG4-related disease features elevated serum IgG4 concentrations and tumefaction or tissue infiltration by IgG4-positive plasma cells. Stone et al. (2012) describe it as affecting diverse organ systems through IgG4 autoantibodies. Diagnostic criteria include pathological confirmation of IgG4 plasma cell infiltration.
How is sclerosing pancreatitis diagnosed using IgG4?
High serum IgG4 concentrations distinguish sclerosing pancreatitis from other pancreatic disorders. Hamano et al. (2001) reported this finding in patients with the condition. It provides a serum biomarker for accurate diagnosis.
What are the comprehensive diagnostic criteria for IgG4-RD?
The 2011 criteria by Umehara et al. require elevated serum IgG4, organ enlargement, and histopathological findings like IgG4-positive plasma cell infiltration. These criteria are practical for nonspecialists. They support clinical diagnosis across affected organs.
What pathological features characterize IgG4-related disease?
Pathology involves storiform fibrosis, obliterative phlebitis, and dense IgG4-positive plasma cell infiltration. Deshpande et al. (2012) established a consensus on these features. Such criteria aid in distinguishing it from mimics like malignancy.
What distinguishes type 1 and type 2 autoimmune pancreatitis?
International criteria by Shimosegawa et al. (2011) categorize autoimmune pancreatitis into type 1, linked to IgG4, and type 2. Type 1 shows IgG4-positive cells and systemic involvement. This aids in pathogenesis studies and management.
What is the role of rituximab in IgG4-related disease?
Rituximab therapy targets B cells in this systemic disease. Stone et al. (2012) review its use in management. It addresses refractory cases with multi-organ involvement.
Open Research Questions
- ? What are the precise pathogenic mechanisms driving IgG4-positive plasma cell infiltration across organs?
- ? How can imaging and biomarkers improve early diagnosis before histopathological confirmation?
- ? What long-term outcomes follow rituximab therapy in multi-organ IgG4-related disease?
- ? Why do some inflammatory myofibroblastic tumors show IgG4 overlap despite distinct nosology?
- ? How do type 1 and type 2 autoimmune pancreatitis differ in granulocytic epithelial lesions and progression?
Recent Trends
The field holds at 29,725 works with no specified 5-year growth rate.
Citation leaders from 2001-2014, such as Hamano et al. (2001, 2688 citations) and Stone et al. (2012, 2528 citations), underscore enduring reliance on early serum IgG4 and diagnostic criteria papers.
No recent preprints or news signal ongoing focus on established pathology and rituximab approaches.
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