Korean J Gastrointest Endosc > Volume 19(2); 1999 > Article

Korean Journal of Gastrointestinal Endoscopy 1999;19(2): 200-208.

직직장암의 수술전 병기판정을 위한 경직장 초음파단층촬영술의 효용성 (The Efficacy of Endorectal Ultrasonography in the Preoperative Staging of Rectal Cancer)

김진천, 조문경, 유창식, 김창남, 이헌경, 정훈용, 양석균 (Jin Cheon Kim, Moon Kyung Cho, Chang Sik Yu, Chang Nam Kim, Hun Kyung Lee, Hwoon Yong Jung and Suk Kyun Yang)

Abstract

Background/Aims:
The precise preoperative staging of rectal cancer is of great im-portance for the selection of an appropriate treatment. Endorectal ultrasonography (EUS) has been proven as an efficient tool for staging in rectal cancer. Moreover, its technical advancement has been enhancing resolution and applications. We evaluated the accuracy of preoperative staging using EUS in rectal cancer and examined whether staging by EUS was an efficient procedure.
Methods:
EUS was performed in 79 patients with rectal cancer diagnosed by colonoscopic biopsy from January to December, 1996. Endoscopic examina-tion was used with Olympus, GF-UM20 and Br?l and Kjaer type 2001 Scanner. The staging by EUS was based on UICC classification.
Results:
Preoperative staging by EUS was equal to pathologic staging in 70.9% (56/79) of cases. Overstaging was found in 17.7% (14/79) and downstaging in 11.4% (9/79). The prediction of lymph node metastases was accurate in 50 of 79 cases (63.3%).
Conclusion:
EUS seems to be an efficient diagnostic method to assess rectal cancer staging. More accurate imaging and further experience in the interpretation is needed to improve the efficacy of EUS. (Korean J Gas-trointest Endosc 19: 200 ∼208, 1999)

Key Words: Endorectal Ultrasound, Preoperative staging, Rectal cancer