Efficacy of high-frequency ultrasound probes for the preoperative staging of invasion depth in flat and depressed colorectal tumors

Saitoh, Yusuke; Obara, Takao; Einami, Katsuya; Nomura, Masafumi; Taruishi, Masaki; Ayabe, Tokiyoshi; Ashida, Toshifumi; Shibata, Yoshimi; Kohgo, Yutaka

doi:10.1016/s0016-5107(96)70226-2

Cited by 168 publications

(90 citation statements)

References 17 publications

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“…Saitoh et al in a prospective analysis of 49 PT type II lesions using a 20 MHz TTS mini probe established diagnostic radial imaging in 76% of cases. 20 Overall accuracy of invasive depth using 20 MHz HFUS was 88% (43/49) (with reference to sm3 and the muscularis mucosa), 85% (11/13) for sm1 carcinoma, and 100% (3/3) for intramucosal carcinoma. 20 However, invasive depth was incorrectly determined in 12% (6/49) of lesions.…”

Section: Discussionmentioning

confidence: 87%

“…20 Overall accuracy of invasive depth using 20 MHz HFUS was 88% (43/49) (with reference to sm3 and the muscularis mucosa), 85% (11/13) for sm1 carcinoma, and 100% (3/3) for intramucosal carcinoma. 20 However, invasive depth was incorrectly determined in 12% (6/49) of lesions. 20 This occurred in three cases due to insufficient acoustic coupling and in two cases due to an attenuated scanning range caused by an elevated G-type lesion morphology.…”

Section: Discussionmentioning

confidence: 87%

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High magnification chromoscopic colonoscopy or high frequency 20 MHz mini probe endoscopic ultrasound staging for early colorectal neoplasia: a comparative prospective analysis

Hurlstone

Brown²,

Cross³

et al. 2005

Gut

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Background: Successful endoscopic management of early colorectal cancer using endoscopic mucosal resection requires the mandatory prediction of invasive depth and lymph node metastasis. Previous data using the Nagata crypt types Vn(B)/(C) as clinical indicators of T2/N+ disease have shown low specificity (50%) with a tendency to over stage lesions. New mini probe ultrasound ''through the scope'' imaging permits staging of lesions proximal to the rectum using direct endoscopic visualisation. Aim: To compare the staging accuracy of the Nagata crypt type V with mini probe high frequency 20 MHz endoscopic ultrasound. Methods: Sixty two patients with a Paris type II flat cancer were imaged using magnification colonoscopy followed by 20/12.5 MHz ultrasound in a ''back to back'' design. Crystal violet staining (0.05%) at 1006 magnification permitted Nagata crypt criteria to be defined. Submucosal deep invasion (sm3+) was defined at ultrasound by the presence or absence of a disrupted third sonographic layer. Predicted T0/1: N0 lesions were resected using endoscopic mucosal resection with the remaining referred for surgery. Ultrasound and magnification staging were then compared with the resected histopathological specimens. Results: One patient was excluded from the study due to poor bowel preparation. Fifty two lesions from 52 patients therefore met inclusion criteria (12 sm1/13 sm2/27 sm3+). Ultrasound (20 MHz) was significantly more accurate for invasive depth staging compared with Nagata stage (p,0.0001) (overall accuracy 93% and 59%, respectively). The sensitivity for lymph node metastasis detection using ultrasound and magnification was 80% and 31%, respectively (p,0.001). The negative predictive value of ultrasound for invasive depth was better than that observed using magnification (88%/47%, respectively). The prevalence of nodal disease overall was 19% (10/52), with 80% (8/10) node positive lesions occurring in the sm3+ lesion group. Conclusions: High frequency 20 MHz ultrasound is superior to magnification alone when differentiating T1/2 disease with a high positive predictive value for sm3 differentiation. Sm3+ invasion was associated with nodal metastasis.

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Section: Discussionmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 87%

High magnification chromoscopic colonoscopy or high frequency 20 MHz mini probe endoscopic ultrasound staging for early colorectal neoplasia: a comparative prospective analysis

Hurlstone

Brown²,

Cross³

et al. 2005

Gut

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“…EUS has been considered useful for tumor staging of colorectal cancers; however, its real clinical impact for deciding on the indication for surgical operation is still not clear [13][14][15]. In the present EUS study, when the change for the third layer (submucosal layer) was 1 millimeter or more the histological SM invasion depth was 4.3 mm.…”

Section: Discussionmentioning

confidence: 55%

Thin-probe endoscopic ultrasonography for surgical resection of early colorectal neoplasms: A pilot study

Yanai¹,

Miura²,

Kawano³

et al. 2017

Gastroenterol Hepatol Endosc

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Purpose: To retrospectively analyze the results of our therapeutic recommendations for EMR and surgical operation using thin-probe EUS for patients with early colorectal neoplasms. Methods:We retrospectively analyzed the therapeutic recommendation for using EUS and the results in 63 lesions of 63 patients. When the depth of the change for the third layer (submucosal layer) was 1 millimeter or more, we recommended surgical operation(EUS operation-recommended group). Results: Surgical operation was suitable for all of lesions in the EUS-operation-recommended group (23 lesions of 23 patients). Conclusion:We think that a change of 1 millimeter or more in the third layer (corresponding to the submucosal layer) in EUS for colorectal neoplasms may be a useful finding for surgical decision making.

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“…Some previous reports have demonstrated the usefulness of EUS, in particular the advantages of high-frequency ultrasound for diagnosing the invasion depth of early colorectal cancer [16][17][18][19]. Hurlstone et al reported that high-frequency ultrasound was superior to magnifying chromoendoscopy for determining depth invasion (accuracy of 93% vs. 59%, respectively).…”

Section: Endoscopic Ultrasonographymentioning

confidence: 99%

The Diagnosis and Treatment of Early-Stage Colorectal Cancer

Sakamoto¹,

Yamada²,

Nakajima³

et al. 2015

Endoscopy - Innovative Uses and Emerging Technologies

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The introduction of colorectal endoscopic submucosal dissection (ESD) has expanded the applications for endoscopic treatment; as a result, lesions with low metastatic potential can be treated endoscopically regardless of the lesion size. The most attractive feature of ESD is the achievement of en bloc resection with a lower local recurrence rate in comparison to that of endoscopic piecemeal mucosal resection. However, in case of gastric cancers, ESD is not as widely applied to the treatment of colorectal neoplasms because of its technical difficulty, longer procedural time, and increased perforation risk. In the movement toward diversified endoscopic treatment strategies for superficial colorectal neoplasms, endoscopists who begin to perform ESD need to recognize the indications of ESD, as well as the technical issues and associated complications of this procedure.

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Efficacy of high-frequency ultrasound probes for the preoperative staging of invasion depth in flat and depressed colorectal tumors

Cited by 168 publications

References 17 publications

High magnification chromoscopic colonoscopy or high frequency 20 MHz mini probe endoscopic ultrasound staging for early colorectal neoplasia: a comparative prospective analysis

High magnification chromoscopic colonoscopy or high frequency 20 MHz mini probe endoscopic ultrasound staging for early colorectal neoplasia: a comparative prospective analysis

Thin-probe endoscopic ultrasonography for surgical resection of early colorectal neoplasms: A pilot study

The Diagnosis and Treatment of Early-Stage Colorectal Cancer

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