Successful management of factor IX inhibitor-associated nephrotic syndrome in a hemophilia B patient.
Pediatr Nephrol
; 28(5): 823-6, 2013 May.
Article
em En
| MEDLINE
| ID: mdl-23381011
ABSTRACT
BACKGROUND:
Nephrotic syndrome (NS) is a recognized complication of immune tolerance induction (ITI) therapy, a treatment strategy used to treat inhibitors in patients with hemophilia B receiving factor IX concentrate. CASE DIAGNOSIS/TREATMENT We present a 4-year-old boy with hemophilia B and an inhibitor who underwent ITI, and developed NS 19 months into this therapy. A percutaneous renal biopsy was safely performed with factor IX (FIX) concentrate administration both preceding and following the procedure. The patient's inhibitor level had increased to 1.4-1.6 Bethesda Units just prior to the onset of proteinuria. Histology confirmed segmental membranous nephropathy (MGN). The patient was continued on FIX concentrate as ITI and also received 4 weekly doses of rituximab and ongoing immunosuppression with mycophenolate mofetil. This resulted in the complete resolution of his inhibitor and his NS. He continues with a modified ITI regimen and remains inhibitor-free without proteinuria >12 months post-biopsy.CONCLUSIONS:
Hemophilia B patients undergoing ITI should be regularly screened for NS. At first detection of proteinuria, with proper precautions, a percutaneous kidney biopsy can be performed safely in patients with low levels of inhibitor. Our patient had segmental MGN with complete remission of NS.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fator IX
/
Coagulantes
/
Glomerulonefrite Membranosa
/
Hemofilia B
/
Anticorpos Monoclonais Murinos
/
Imunossupressores
/
Anticorpos
/
Ácido Micofenólico
/
Síndrome Nefrótica
Tipo de estudo:
Diagnostic_studies
/
Risk_factors_studies
Limite:
Child, preschool
/
Humans
/
Male
Idioma:
En
Revista:
Pediatr Nephrol
Assunto da revista:
NEFROLOGIA
/
PEDIATRIA
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Estados Unidos