Abstract:
BACKGROUND:Fabry disease (FD) is an X-linked lysosomal storage disorder caused by mutations of the GLA gene, followed by deficiency in α-galactosidase A (α-gal) activity. Nephrotic syndrome, as the renal phenotype of FD, is unusual. Here, we report the rare case of a patient with FD with nephrotic syndrome whose proteinuria disappeared by immunotherapy. CASE PRESENTATION:A 67-year-old Japanese man was admitted to our hospital because of emesis, abdominal pain, and facial edema due to nephrotic syndrome. The patient was diagnosed with focal segmental glomerulosclerosis (FSGS) by renal biopsy before being diagnosed with FD, and immunotherapy was initiated. After treatment, the kidney biopsy results showed typical glycosphingolipid accumulation in the podocytes of this patient. The white blood cell α-gal activity was very low, and genetic analysis revealed a GLA gene variant (M296I), which is known as a late-onset genetic mutation of FD. Immunotherapy (steroids and cyclosporine A) dramatically improved the massive proteinuria. Currently, he has been undergoing enzyme replacement therapy, and his proteinuria has further decreased. There is the possibility that other nephrotic syndromes, such as minimal change nephrotic syndrome or FSGS, may co-exist in this patient. CONCLUSIONS:We experienced the rare case of a FD patient whose nephrotic syndrome disappeared by immunotherapy. These findings suggest that immunosuppressive treatment may be considered if nephrotic syndrome develops, even in patients with FD.
journal_name
BMC Nephroljournal_title
BMC nephrologyauthors
Fujisawa H,Nakayama Y,Nakao S,Yamamoto R,Kurokawa Y,Nakamura N,Nagata A,Tsukimura T,Togawa T,Sakuraba H,Fukami Kdoi
10.1186/s12882-019-1657-7subject
Has Abstractpub_date
2019-12-17 00:00:00pages
469issue
1issn
1471-2369pii
10.1186/s12882-019-1657-7journal_volume
20pub_type
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