With reference to the case report “Percutaneous nephrostomy to relieve renal tract obstruction in pregnancy”in the May issue by Trewhella et al (1991) the claim is made that percutaneous nephrostomy in pregnancy has not been reported previously. I performed bilateral percutaneous nephrostomy on a primigravid patient 27 weeks pregnant in 1984. This was subsequently reported by my clinical colleagues, Lewis et al,(1985).