IgA nephropathy in two adolescent sisters heterozygous for Fabry disease

Whybra, Catharina; Schwarting, Andreas; Kriegsmann, Jörg; Gal, Andreas; Mengel, Eugen; Kampmann, Christoph; Baehner, Frank; Schaefer, Ellen; Beck, Michael
September 2006
Pediatric Nephrology;Sep2006, Vol. 21 Issue 9, p1251
Academic Journal
We report a 16-year-old girl and her one-year-younger sister, both heterozygous for the c.34del24 mutation of the GLA (alpha-galactosidase A) gene, which they inherited from their father who is affected by Fabry disease (FD). Both girls presented with macrohematuria and rapidly progressing proteinuria. Urine analysis revealed glomerular hematuria and a nephrotic range of proteinuria suggesting a concomitant glomerulonephritis. Light microscopy of kidney biopsy was characteristic of IgA nephropathy (IgA deposits in mesangial areas and glomerular capillary loops, and mesangial hypercellularity), whereas electron microscopy showed changes typical of Fabry disease (multiple osmiophilic inclusions in the subendothelial and mesangial areas). These two cases and similar reports in the literature suggest that IgA nephropathy in FD is not merely coincidental.


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