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IgA nephropathy: A brief review.

Jared R Hassler¹

¹Department of Pathology, Temple University Health System, Temple University Hospital, 3401 N. Broad St, Philadelphia, PA 19140, United States.

Seminars in Diagnostic Pathology

|April 4, 2020

Summary

This summary is machine-generated.

IgA nephropathy, a common kidney disease, involves abnormal IgA production. Diagnosis relies on identifying IgA deposits and mesangial changes, often using the MEST-C score.

Keywords:

Galactose-deficient IgA1 IgA nephropathy MEST score MEST-C score Mesangial deposit Oxford classification

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Area of Science:

Nephrology
Immunopathology
Renal Histopathology

Background:

IgA nephropathy is the most prevalent primary glomerulopathy globally, presenting a lifelong clinical course.
Its pathogenesis is complex, involving a proposed four-hit process centered on aberrant immunoglobulin A (IgA) production.
Histologic findings vary, but diagnosis hinges on characteristic IgA deposition in the kidney's mesangium.

Purpose of the Study:

To review the diverse histological features crucial for diagnosing IgA nephropathy.
To explain the calculation and significance of the MEST-C score in IgA nephropathy assessment.

Main Methods:

Review of existing literature on IgA nephropathy histology and classification.
Explanation of diagnostic criteria based on immunofluorescence and light microscopy.
Description of the MEST-C scoring system components.

Main Results:

Histological examination reveals varied patterns, with IgA deposits in the mesangium being a key diagnostic marker.
Mesangial hypercellularity is a significant finding on light microscopy.
The MEST-C score, introduced by the 2009 Oxford Classification, quantifies key histological features.

Conclusions:

Accurate histological assessment is vital for diagnosing IgA nephropathy.
The MEST-C score provides a standardized method for evaluating disease severity and predicting outcomes.
Understanding these histological features aids in managing this common kidney disease.