Staging of Primary Rectal Carcinoma: Pre-operative Comparative Study of Endorectal Ultrasonography Versus CT.
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Seventeen patients were examined by endorectal ultrasonography and computed tomography prior to resection of primary rectal carcinoma. In 6 patients (out of the 17 patient which were subjected to TRUS examination), the TRUS did not completed and the upper limit of the tumor cannot be assessed due to presence of non-passable narrowing of the rectal lumen. There were 2 patients in stage T2 (invasion of muscularis propria), 13 patients in stage T3 (invasion through the muscularis propria), 2 patients in stage T4 (invasion of the contagious organs) and non in stage TI (invasion of the submucosa only). TRUS and CT detected all 17 rectal cancers (sensitivity = 100% for both) and had an over all staging accuracy of local tumor ('T) 82.3% and 88.2% respectively, and accuracy of staging regional lymph nodes (N) 70.5% for both modalities.