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New modality for the quantitative evaluation of tissue elasticity using a forward-viewing radial-array echoendoscope for colorectal neoplasms.

Abstract：

PURPOSE:Sound speed correction (SSC) is a non-invasive modality that quantifies the hardness of neoplasms. The aim of our study was to evaluate the usefulness of SSC for the diagnostic accuracy of colorectal neoplasms and to differentiate the depth of invasion. METHODS:Forty colorectal neoplasms, contributed by 40 patients, were included in the analysis. The primary outcome was the diagnostic ability of SSC for the depth of invasion of colorectal neoplasms, with the secondary endpoint being the clinical efficacy of SSC to distinguish between a neoplasm and normal mucosa. RESULTS:The median sound speeds for colorectal neoplasms and normal mucosa were 1580 m/s and 1515 m/s, respectively (p < 0.001), with a median sound speed of 1583 m/s for lesions with a depth shallower than that of the muscularis propria and 1610 m/s for depths deeper than that of the muscularis propria (p = 0.002). The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy were 80.0%, 100%, 100%, 83.3%, 90.0%, and 100%, respectively, for the diagnosis of neoplasms (using a cut-off sound speed of 1557 m/s) and 100%, 77.8%, 33.3%, 100%, 80.0%, respectively, for the diagnosis of the depth of invasion (using a cut-off of 1590 m/s). CONCLUSION:We identified absolute sound speeds for colorectal neoplasms and the depth of invasion of neoplasms which yielded a good diagnostic performance. SSC provides an objective evaluation of colorectal neoplasms and the depth of invasion of neoplasms and, thus, might be a useful modality in practice. TRIAL REGISTRATION:UMIN000038235 , Date of registration; October 8, 2019.

journal_name

Int J Colorectal Dis

journal_title

International journal of colorectal disease

authors

Esaki M,Yamamura T,Nakamura M,Maeda K,Sawada T,Mizutani Y,Ishikawa E,Furukawa K,Kawashima H,Hirooka Y,Fujishiro M

doi

10.1007/s00384-020-03790-w

subject

Has Abstract

pub_date

2020-10-28 00:00:00

eissn

0179-1958

issn

1432-1262

pii

10.1007/s00384-020-03790-w

pub_type

杂志文章

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