RESUMEN
A clinical and statistical observation was made on out-patients and in-patients admitted to the Department of Urology, Seoul National University Hospital for the past 24 years from 1954 to 1977. The observations were summarized as follows. 1. During the period, the total number of out-patients was 63,438 and that of in-patients, 6,028. 2. In the out-patients, lower urinary tract infections such as urethritis and prostatitis were the most common diseases regardless of the time period. 3. In the in-patient, the frequency of the disease has been changed with the lapse of time in the order of the occurrence. The interesting changes of the disease order related to the time period were noted as follows. 1954-1960 : genitourinary tuberculosis, urolithiasis, tumor, injury and congenital anomaly. 1961-1970 : urolitiasis, tumor, genitourinary tuberculosis, injury, infection and congenital anomaly. 1971-1977 : tumor. urolithiasis, genitourinary tuberculosis, congenital anomaly, injury and infection. 4. In 1977, 10 major diseases were tumor, ureteral stone, infertility, renal tuberculosis, B. P. H. hypospadias, varicocele, renal stone, scrotal injury and renal tumor 5. Major operations were performed on 4,122 cases during the period. Nephrectomy and ureterolithotomy were the most common operations. Recently, total cystectomy with ileal loop diversion, transurethral procedure and vasovasostomy, which require more skillful techniques, are increasing in number.