Imaging studies and cervical cancer continued

In the staging of cervical cancer, CT may be unofficially substituted for an intravenous pyelogram in the evaluation of ureteral obstruction. In addition, CT scans may provide information regarding tumour size, lymph node enlargement and the presence of distant metastases. CT and MRI have comparable accuracies in determining lymph node metestases in cervical carcinoma of 85-95%.10 Meta-analysis of published studies confirmed that CT and MRI performed to a similar degree of accuracy in the detection of lymph node metestases and slightly better than lymphangiography.!! A finding of enlarged lymph nodes on CT scanning has a specificity of 93%, but a positive predictive value of only 39%.9,10

Enlarged lymph nodes or evidence of metastatic disease on a CT scan warrant further investigation with other imaging or biopsy.

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