Contrast Of Preoperative TRUS Staging And Postoperative TNM Staging In Rectal Cancer

AIM:To explor the diagnostic value of transrectal ultrasonography (TRUS) in preoperative staging of rectal carcinoma and the relationship between TRUS and postoperative TNM staging.METHODS:Forty-six patients with pathologically confirmed rectal carcinoma were detected by TRUS before surgery. The status of the bowel wall invasion and lymph-node metastasis of tumor was recorded. The preoperative transrectal ultrasonographic staging of rectal carcinoma was performed using the TNM staging system. The preoperative staging results were then compared with those of postoperative pathologic staging with standard AJCC staging system.RESULTS:The overall accuracy rate of preoperative T staging of rectal carcinoma was 89.1%(41/46) and the total N stage accuracy was 86.2%(25/29), the sensitivity and specificity was 92.6%(25/27) and 78.9%(15/19) respectively by TRUS. The preoperative TRUS staging and the postoperative staging have not significant difference it in evaluation against staging I and staging II or highest (p>0.05)CONCLUSION:TRUS has a high diagnostic accuracy in preoperative staging of rectal carcinoma. TRUS in combination of T staging with the status of lymph-node metastasis by tumor can improve the diagnostic accuracy of preoperative staging of rectal carcinoma.