Etiology and pathogenesis of focal and segmental glomerulosclerosis (FSGS) in patients with toxemia of pregnancy remain controversial. We examined 15 preeclamptic patients presenting with nephrotic syndrome. None of the patients had urinary abnormalities and hypertension before pregnancy. Clinically, proteinuria first developed during pregnancy and disappeared completely in all but one patient lost to follow-up after 1–30 months from delivery. Renal dysfunction, hypertension and edema rapidly resolved in the postpartum period. None of the patients had a progressive clinical course. Renal biopsy specimens obtained postpartum revealed typical features of preeclamptic nephropathy. In addition, findings compatible with FSGS were observed in 13 patients including 4 in which such lesions were unearthed by additional serial sectioning. These results indicate that FSGS may not only be induced by preeclampsia but also be one of the representative glomerular changes in preeclamptic patients with nephrotic syndrome. A favorable clinical course ensues in a manner similar to that of patients with the garden -variety of preeclampsia.

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