Nitrogen mustard therapy in children with frequent-relapsing nephrotic syndrome and steroid toxicity.

Nitrogen mustard (HN-2) is an alkylating agent known to be effective in inducing and prolonging remissions of nephrotic syndrome in children. The fact that the drug is administered intravenously eliminates the problem of compliance, and the fact that the treatment needs to be given only for a few days may lower the incidence of side-effects observed with other cytotoxic agents. We administered HN-2 to 12 children with the steroid-sensitive frequent-relapsing form of nephrotic syndrome, who had evidence of steroid toxicity. Life table analysis reveals a 46% sustained remission rate after 27 mo of follow-up. Complications of HN-2 treatment included only mild thrombophlebitis (2 patients) and mild local paresthesia (1 patient).