Renal vein thrombosis: occurrence in membranous glomerulonephropathy and lupus nephritis.

Renal vein thrombosis developed in 11 of 280 patients having either biopsy-proved membranous glomerulonephropathy or systemic lupus erythematosus with nephritis. All 11 also were found to have nephrotic syndrome. In nine, nephrotic syndrome developed before renal vein thrombosis; the diagnoses of nephrotic syndrome and renal vein thrombosis were made simultaneously in the other two. Ten of the 11 patients also had pulmonary emboli at or near the time of renal vein thrombosis.