Aggressive treatment of severe idiopathic focal segmental glomerulosclerosis.

When focal segmental glomerulosclerosis (FSGS) has reached the stage of chronic renal insufficiency, further progression is usually considered inevitable. African-American patients are believed to exhibit a particularly aggressive form of FSGS. We have treated five African-American patients, aged 11-18 years, with FSGS and reduced renal function using intensive intravenous methylprednisolone protocol, combined with chlorambucil in three cases. All patients had a pretreatment creatinine clearance of less than 50 ml/min per 1.73 m2. Three patients responded with normalization of creatinine clearance and serum albumin levels and had no or only minimal proteinuria at latest follow-up. One patient showed no improvement and one patient progressed to end-stage renal disease. These findings indicate, for the first time, that even severe FSGS may respond to aggressive methylprednisolone with or without alkylating agent treatment, and that African-American race does not preclude a favorable response.