Surgical navigation system for laparoscopic lateral pelvic lymph node dissection in rectal cancer surgery using laparoscopic-vision-tracked ultrasonic imaging

Ma, Lei; Wang, Junchen; Kiyomatsu, Hidemichi; Tsukihara, Hiroyuki; Sakuma, Ichiro; Kobayashi, Etsuko

doi:10.1007/s00464-020-08153-8

Cited by 11 publications

(3 citation statements)

References 29 publications

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“…On the basis of previous research, [15][16][17] The results of this study showed that there was a close relationship between the depth of rectal tumor invasion and metastatic LNs, and the probability of LN metastasis was greater in patients with deeper invasion, and UT stage was an important risk factor for perirectal LN metastasis. Previous studies References 18,19 had also pointed out that early rectal cancer had a lower risk of LN metastasis, which were confined to the mucosa because of its shallow infiltration depth.…”

Section: Discussionmentioning

confidence: 56%

“…On the basis of previous research, 15–17 in addition to incorporating the factor of conventional ultrasound features, this study also selected some other factors potentially affecting perirectal LN metastasis, then assigned values to these factors, and analyzed these factors by binary logistic regression method. Univariate analysis showed that circumferential angle of the tumor, UT stage, conventional ultrasound features diagnosis of LN metastasis, SR of tumor were risk factors for LN metastasis, while RI of rectal tumor was protective factor.…”

Section: Discussionmentioning

confidence: 99%

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A model based on endorectal ultrasonography predicts lateral lymph node metastasis in low and middle rectal cancer

weifeng

Wang

et al. 2022

J of Clinical Ultrasound

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Purpose To investigate the risk factors for lymph node (LN) metastasis in low and middle rectal tumors, construct a predictive model and test the model's diagnostic efficacy. Methods The clinical and pathological data of 172 patients with rectal cancer confirmed by surgery were retrospectively evaluated, among whom 61 patients were finally included in this study. Patients were divided into positive groups and negative groups based on LN metastasis, and risk factors that might affect LN metastasis were analyzed. Finally, a risk predictive model was constructed based on the weights of each risk factor. Results Compared with pathology, the efficacy of diagnosing LN metastasis only according to conventional endorectal ultrasonography (ERUS) features of LN was not high, with sensitivity 67%, specificity 86%, positive predictive value 76%, negative predictive value 80%, and accuracy 79%. Univariate analysis showed that circumferential angle of the tumor, ultrasonic T‐ stage (UT stage), conventional ultrasound features diagnosis of LN metastasis, strain ratio (SR) of tumor were risk factors for LN metastasis, while vascular resistance index of rectal tumor was protective factor. Multivariate analysis showed that UT stage (OR = 7.188, p = 0.049), conventional ultrasound features diagnosis of LN metastasis (OR = 8.010, p = 0.025) and SR (OR = 5.022, p = 0.031) were independent risk factors for LN metastasis. These risk factors were included in logistic regression analysis and the model was established, Y = −7.3 + 1.9 X10 + 2.1 X11 + 1.6 X13 (Y = Logit[P], P: LN metastasis rate, X10: UT stage, X11: conventional ultrasound features diagnosis of LN metastasis, X13: SR). The receiver operating characteristic (ROC) curve was used to test the model's predictive efficacy, the area under the curve was 0.95, sensitivity: 95%, specificity: 87%. Hosmer–Lemeshow goodness of fit test showed X2 = 6.015, p = 0.65 (p > 0.05), indicating that the model had a high predictive value. Conclusion Evaluation of perirectal LN metastasis only based on conventional ERUS features of LN was not effective enough. UT stage of tumor, conventional ultrasound features diagnosis of LN metastasis and SR were independent risk factors for LN metastasis. The predictive model had good assessment efficacy and had certain clinical application value.

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Section: Discussionmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 99%

A model based on endorectal ultrasonography predicts lateral lymph node metastasis in low and middle rectal cancer

weifeng

Wang

et al. 2022

J of Clinical Ultrasound

View full text Add to dashboard Cite

show abstract

“…Although available imaging techniques have high sensitivity for large tumor masses, they have limitations in the detection of small in situ tumors and metastatic tumors. [8][9][10][11] Consequently, many tiny tumors are overlooked, and new technologies and methods are required to locate such tumors more accurately.…”

Section: Introductionmentioning

confidence: 99%