Takayasu's arteritis and nephrotic syndrome in a patient with crossed renal ectopia.

A male patient with nephrotic syndrome, crossed renal ectopia, and extensive Takayasu's arteritis (TA), involving one of the renal arteries, is described. Renal histology showed amyloidosis. After reviewing the literature and considering the finding of raised serum amyloid protein A levels, it was concluded that TA had probably caused the amyloidosis. The crossed renal ectopia must have been a purely coincidental finding.