Tseng L J, Mo L R, Thian L T, Jao Y T
Department of Gastroenterology, Tainan Municipal Hospital, Taiwan, ROC.
Hepatogastroenterology. 1999 Mar-Apr;46(26):891-3.
BACKGROUND/AIMS: To assess the accuracy of a new generation endoscopic ultrasonography (EUS)(GF-M200) in pre-operative staging of recto-sigmoid colon carcinoma invasion and lymph node metastasis.
Seventy-three patients with biopsy proven colon cancer were included in this study. These comprised 60 patients with rectal carcinoma and 13 patients with sigmoid carcinoma. All patients were pre-operatively examined by EUS. Pathological findings of the depth of tumor invasion and presence of lymph node metastasis were correlated with EUS.
EUS has an overall accuracy rate of 89% in staging of recto-sigmoid cancer. The diagnostic accuracy rate was 83% for T1, 83% for T2, 93% for T3, and 71% for T4. Understaging and overstaging occurred in 6% and 6%, respectively. In determining lymph node metastasis, the overall accuracy rate was 77%, with a sensitivity and specificity rate of 77% and 76%, respectively.
EUS is a valuable staging modality in the staging of the depth of tumor invasion, not only for rectal carcinoma but also for tumors located at the sigmoid colon.
背景/目的：评估新一代内镜超声（EUS）（GF-M200）在术前评估直肠乙状结肠癌浸润及淋巴结转移分期中的准确性。
本研究纳入73例经活检证实为结肠癌的患者，其中直肠癌患者60例，乙状结肠癌患者13例。所有患者术前均接受EUS检查。将肿瘤浸润深度及淋巴结转移的病理结果与EUS结果进行相关性分析。
EUS对直肠乙状结肠癌分期的总体准确率为89%。T1期诊断准确率为83%，T2期为83%，T3期为93%，T4期为71%。分期过低和过高的发生率分别为6%和6%。在判断淋巴结转移方面，总体准确率为77%，敏感性和特异性分别为77%和76%。
EUS不仅对直肠癌，而且对乙状结肠癌的肿瘤浸润深度分期是一种有价值的分期方法。
