[The evaluation of clinical staging by preoperative CT examination in patients with bladder cancer]

50 patients with bladder cancer, treated from september 1988 to September 1994 was analysed to compare preoperative CT examination with postoperative pathological diagnosis. The coincident staging of CT and pathological finding was found to be 86% (43/50). In the remaining 7 patients, 4 were of overstaging and 3 were of understaging respectively. The cause of incorrecting staging by preoperative CT was usualy due to the difficulty in determing if lymph node metastasis occurs. It is suggested that to improve the preoperative CT staging, the thin phase scanning to the area of lymph nodes around the iliac artery and obsturatorius should be carried out if the patient has been confirmed to have hydronephrosis.