Abstract
Thin-probe endoscopic ultrasonography for surgical resection of early colorectal neoplasms: A pilot study
Highlights
Surgical operation has a curative role for early colorectal neoplasms for which invasion is limited to within the submucosal layer [1,2]
Clinicopathological data show that mucosal layer (M) carcinoma or carcinoma with slight submucosal layer (SM) invasion without lymphatic vessel infiltration is mostly safe from metastasis and that endoscopic mucosal resection (EMR) is adequate for it
It was reported that the lymph node metastasis rate of colorectal carcinoma with an SM invasion depth of 1,000 micrometers (1 mm) or more was 12.5%
Summary
Surgical operation has a curative role for early colorectal neoplasms for which invasion is limited to within the submucosal layer [1,2]. The widespread use of endoscopic mucosal resection (EMR) and development of submucosal dissection have made possible local resection for early colorectal neoplasms [5]. Clinicopathological data show that mucosal layer (M) carcinoma or carcinoma with slight submucosal layer (SM) invasion without lymphatic vessel infiltration is mostly safe from metastasis and that EMR is adequate for it. Curative surgical resection is required for such lesions with deep SM invasion. In this situation, pretherapeutic estimation of deep SM invasion by early colorectal neoplasms is needed [6]
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