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Endosonographic diagnosis of early colorectal tumour invasion using ultrasound miniature probe
Author(s) -
Hizawa,
Kawasaki,
Hirakawa,
Aoyagi,
Xin Yao,
Fujishima
Publication year - 2000
Publication title -
colorectal disease
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.029
H-Index - 89
eISSN - 1463-1318
pISSN - 1462-8910
DOI - 10.1046/j.1463-1318.2000.00124.x
Subject(s) - medicine , diagnostic accuracy , ultrasound , rectum , radiology , rectal carcinoma , pathology , colorectal cancer , gastroenterology , cancer
Objective We sought to determine the accuracy of differentiating between mucosal and submucosal colorectal tumour invasion using a high‐frequency ultrasound miniature probe. Patients and methods We analysed 43 lesions sonographically interpreted as T1 colorectal tumours, and evaluated the accuracy of detecting mucosal neoplasia (true‐positive and true‐negative mucosal neoplasias divided by all lesions). Results The overall accuracy of detecting mucosal neoplasia was 74%. Sonographic images were easily obtained under direct visualization, even for small and non‐polypoid lesions anywhere in the colon and rectum. However, diagnostic accuracy tended to be low in polypoid lesions >20 mm in width, and pure carcinoma with submucosal invasion. The submucosal layer in 16 lesions was visualized as a more detailed laminar structure, whereas the remaining 27 lesions showed a single hyperechoic submucosal layer. However, there were no significant differences in accuracy between the two. Conclusion The high‐frequency ultrasound miniature probe system may be useful for evaluating small non‐polypoid colorectal tumours because of easy manipulation rather than high resolution visualization.