An observation about the age of first visit, the location of external meats and the method and success rate of the first and second operation, was made on 134 hypospadias of the in-patients in the Department of Urology, Yonsei University Hospital during the period of January l966 through July 1985 and the following results were obtained:
l. The distribution of the distal shaft type was increased and the penoscrotal type was decreased.
2. In first stage operation, the Byars method was used largely before the period 1980, the Nesbit (67.5%) was used largely after the period l98l.
3. The method of urethroplasty was mainly Thiersch Duplay and Crawford. After the period 1981, Flip-fiap and MAGPI method was also used and the use of microscope (35.7%) was increased.
4. The success rate of Duplay method was increased and of Crawford method was not changed. The total success rate was 72.7% before the period 1975, 55.3% before the period 1980, 71.4% after the period 1981. Especially, the success, rate of operation using microscope was 80%.
5. The success rate according to meatal location was increased when the meatus was more distally located.
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