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    Area of Science:

    • Immunology
    • Rheumatology
    • Pathology

    Background:

    • Immunoglobulin G4-related disease (IgG4-RD) is a non-malignant, chronic immune-mediated condition.
    • First recognized in 2012, with classification criteria established in 2020.
    • Characterized by fibroinflammatory lesions affecting nearly any organ, often presenting as multi-organ involvement.

    Purpose of the Study:

    • To summarize the latest information essential for diagnosing IgG4-related disease.
    • To highlight the necessity of integrating clinical, serologic, radiologic, and pathologic data for diagnosis.

    Main Methods:

    • Review and synthesis of current literature on IgG4-related disease diagnosis.
    • Compilation of key diagnostic indicators and criteria.

    Main Results:

    • IgG4-RD can mimic malignancy, infections, or other immune conditions.
    • Specific organ predilections include salivary glands, orbits, pancreas, lungs, kidneys, aorta, meninges, and thyroid.
    • Accurate diagnosis relies on a comprehensive approach combining various data types.

    Conclusions:

    • Establishing a diagnosis of IgG4-RD necessitates a correlation of clinical, serologic, radiologic, and pathologic findings.
    • Up-to-date information is crucial for the accurate and timely diagnosis of this complex condition.