Abstract
Heavy proteinuria and/or the nephrotic syndrome rarely occur late in pregnancy. We report the clinical and renal biopsy findings on 11 patients with the nephrotic syndrome occurring during pregnancy in whom light and electron microscopic findings were characteristic of pre-eclampsia. Immunofluorescent microscopy revealed deposits of IgG, IgM, IgA, beta 1C globulin, and fibrinogen, predominantly in the subendothelial position. Only two patients were primigravid; three were in their second or third pregnancy; in six, pre-eclampsia first occurred in the fourth to eighth pregnancy. Clinical abnormalities appeared first between the 23rd and 39th week of gestation. All patients had marked elevation of blood pressure and of serum uric acid levels. Of the 12 infants, eight were alive and well, including one set of twins; four were stillborn. Following delivery, clinical resolution was similar to that in less severe pre-eclampsia. The findings suggest the possible importance of the role of intravascular coagulation in the genesis of pre-eclampsia.
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