PMC10286734_01
Glomeruli exhibit mild-moderate degree of mesangial hypercellularity and matrix increase; light microscopy (H & E stain, original magnification x 400).
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Figure1
The majority of the viable glomeruli revealed a predominantly mesangiopathic process characterized by mild to moderate diffuse increase in mesangial matrix and cellularity with segmental variation (Figure 1).
One of the globally sclerosed glomeruli; light microscopy (PAS stain, original magnification x 100).
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Figure2
There was focal interstitial edema, infiltrate, and 2 globally sclerosed glomeruli (Figure 2). 
Mesangial and capillary wall IgA deposits (immunofluorescence staining for IgA, original magnification x 400).
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Figure3
Immunofluorescence microscopy depicted a strong (3+) granular mesangial (Figure 3) and capillary loop staining (in a segmental fashion) for IgA.