Premium
Application of Endoscopic Sonography in Preoperative Staging of Rectal Cancer
Author(s) -
Lin Shiyong,
Luo Guangyu,
Gao Xiaoyan,
Shan Hongbo,
Li Yin,
Zhang Rong,
Li Jianjun,
He Longjun,
Wang Guobao,
Xu Guoliang
Publication year - 2011
Publication title -
journal of ultrasound in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 91
eISSN - 1550-9613
pISSN - 0278-4297
DOI - 10.7863/jum.2011.30.8.1051
Subject(s) - medicine , radiology , colorectal cancer , diagnostic accuracy , cancer staging , stage (stratigraphy) , endoscopy , cancer , paleontology , biology
Objectives The aim of this study was to evaluate our experience with the application of endoscopic sonography in preoperative staging of rectal cancer. Methods Between April 2004 and May 2010, 192 patients with rectal cancer first underwent endoscopic sonography and then underwent surgery at our hospital. None of the patients in this study received neoadjuvant therapy. The endoscopic sonographic staging results were compared with those of postoperative pathologic staging. Results The accuracy of overall T staging was 86.5%, and for T1, T2, T3, and T4, the accuracy rates were 86.7%, 94.0%, 86.2%, and 65.5%, respectively. The accuracy of T staging for ulcerated lesions was significantly lower than that for nonulcerated lesions ( P = .013). The accuracy of T staging between nontraversable stenotic lesions and traversable lesions was also significantly different ( P = .002). The accuracy of N staging was 77.8%, and the specificity and sensitivity were 85.6% and 74.2%, respectively. Conclusions Endoscopic sonography is safe and effective for preoperative staging of rectal cancer and should be a routine examination before surgery. As for ulcerated and nontraversable stenotic lesions, however, the results of endoscopic sonographic staging could be doubtful. Moreover, the accuracy of endoscopic sonographic N staging still needs modification by further research.