A brief summary is given of the clinical statistical findings in 37 patients with exstrophy of the bladder, most of the whom have been reported in a previous paper. Four cases are presented for whom the method of operating by stages was applied. They have now been followed up for 17, 10, 8 and 6 years respectively and a very satisfactory functional result was obtained. The experience gained from the use of such a method clearly indicates that treatment should be carried out, whenever possible, by a one-stage operation, or by two stages within a short period of time, and at an early age. Two cases operated upon by this latter method of total primary functional reconstruction, with very encouraging morphological results, are reported.