Objective: Long-term outcome of steroid-sensitive idiopathic nephrotic syndrome (SSNS) in children is usually considered benign, although data on follow-up into adulthood are scarce. The aim of this study was to investigate adults who had childhood SSNS regarding their relapse rate, growth, and renal and extrarenal morbidity.
Study Design: Adult patients (n=42, 26 males) were evaluated at a median age of 28.0 (18.1 to 46.9) years and a median follow-up of 22.0 (2.9 to 39.0) years since diagnosis.
Results: Fourteen of 42 (33%) patients relapsed in adulthood. The number of relapses during childhood and adolescence and a complicated course-administration of steroid-sparing medication such as cyclophosphamide, chlorambucil, and cyclosporin A-were identified as risk factors. Final adult height (median SD score -0.4, range -3.3 to +1.3) and body mass index (BMI) were normal. Renal function was normal in all patients, and overall morbidity was low. Only eight patients (three males) had children. Cytotoxic therapy was identified as a major factor contributing to childlessness.
Conclusion: Relapses in adulthood were common in pediatric patients with SSNS. Growth and renal function were normal, and overall morbidity was low. Yet, transition to an adult nephrologist is recommended for all children with relapsing SSNS.
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