AI Article Synopsis
- The study aimed to compare the effectiveness of transrectal ultrasound (TRUS), hydro-computed tomography (hydro-CT), and endorectal MRI in staging rectal cancer before surgery.
- Out of 23 patients with rectal adenocarcinoma, T staging accuracy was around 83%, with some tumors being overestimated or underestimated by each imaging method.
- The results showed that while hydro-CT and endorectal MRI diagnosed local lymph node involvement accurately in a majority of cases (87% and 83% respectively), TRUS had limitations, particularly in advanced cases, suggesting that it may be beneficial to use additional imaging methods.
Article Abstract
Aim: The aim of this study was to compare transrectal ultra-sound (TRUS), hydro-computed tomography (hydro-CT), and endorectal magnetic resonance imaging (MRI) in the preoperative staging of rectal cancer.
Patients And Methods: 23 patients with rectal adenocarcinoma underwent TRUS, hydro-CT, and MRI (1 Tesla) with endorectal coil. The results were correlated with the histopathological findings based on the TNM classification.
Results: T staging with TRUS, hydro-CT, and endorectal MRI correlated with the histopa-thological findings in 83% of patients (19/23). Tumors were overestimated by TRUS in 2/23 patients, by CT in 3/23, and by MRI in 3/23 patients. Tumor size was underestimated by TRUS in 2 patients, by CT and MRI in 1 case each. Local lymphatic node involvement was correctly diagnosed with CT and MRI in 87% and 83%, respectively. Using TRUS, false-negative results in the staging of lymph node involvement were seen in 3/23 patients, whereas 1 patient was over-staged. Using hydro-CT as well as endorectal MRI, overstaging of the local lymph nodes took place in 2/23 patients.
Conclusion: All methods are limited because peritumoral inflammation cannot be precisely distinguished from infiltration by the tumor. Correct lymph node staging is hampered in advanced disease using TRUS. In these patients, further cross-sectional imaging may be required.
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| http://dx.doi.org/10.1159/000121359 | DOI Listing |
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