ABSTRACT
Bladder tumors initially may be diagnosed by excretory urography. In this study, 60 excretory urogramsincluding 40 cases of biopsy proved blaadder tumor and 20 cases of cystoscopically normal bladder were analyzed.Five experienced readers reviewed five radiographs of each case. The results were as follows: 1. Male to remaleratio was 5.7:1, and the highest incidence of age distribution was between 60 and 69 year with 48%. 2. The tumorswere chiefly located in lateral wall of bladder. (67%) 3. Among 40 cases, pathologic diagnosis was as follows:Transitional cell ca. 39 cases, and squamous cell ca. lcase. 4. The I.V.P. finding showed 82% of normal upperurinary tract, 13% of hydronephrosis, 5% of non-visualization, and 58% of filling defect in bladder. 5. Originalinterpretation of urogram was as follows: Of 40 cases with bladder ca., 45% as positive, 13% as suspicious, and38% as negative. Of 20 cases with normal, 95% as negative, and 5% as positive. 6. Analysis by this study was asfollows: Accuracy 68%, sensitivity 62%, specificity 80%, false positive rate 38%, and false negative rate 20%. 7.25 min A-P radiograph was most valuable projection and oblique projection did not significantly increasesensitivity.