Computed tomography is noninvasive and provides relatively accurate information on the cancer involvement of the kidneys, rectum and bladder. Recently computed tomography (CT) is selectively used along with the other diagnostic methods in the
staging of
the cervical cancer. The authors have aimed to compare the efficacy of the CT with other study methods, and to investigate if replacement by CT is possible.
From January 1985 to March 1989, 472 cervical cancer patients underwent pre-staging studies including computed tomography. The concordance rate, positive predictive values, negative predictive values, sensitivity, specificity of each method of
study
were compared. When the results of the CT and IVP were the same, hydronephrosis occurred in 19cases and was not present in 472 cases, resulting in 98.9% concordance rate. The positive predictive value of CT for hydronephrosis was 95% and the
negative
predictive value was 99%. The concordance between CT and cystoscopy with regard to bladder invasion showed that 11 cases were positively concordant, 157 cases were negatively concordant, the positive predictive value of CT for bladder invasion
was
33.3%
and the negative predictive value was 100%. The concordance between CT and sigmoidoscopy with regard to rectal invasion showed that 1 case was positively concordant, 415 cases were negatively concordant and the positive predictive value of CT for
rectal
invasion was 6.3% and the negative predictive value was 100%.
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