“…SIR-The nephrotic syndrome associated with secondary syphilis in man has been previously reported (Robins and Ladd, 1962;Falls, Ford, Ashworth, and Carter, 1965;Braunstein, Lewis, Galvanek, Hamilton, and Bell, 1970;Bhorade, Carag, Lee, Potter, and Dunea, 1971). However, the specificity of the lesions is still in doubt, since the causative antigen involved in syphilitic nephrosis has not been demonstrated so far.…”