经直肠双平面超声测量“角征”深度在直肠癌T分期中的临床价值

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ABSTRACTObjectiveTo measure the“angular sign”depth by transrectal biplane ultrasound，and to explore its clinicalvalueinT-stagingofrectalcancer.MethodsAtotalof33patientswithrectalcancerconfirmedbypostoperative pathology inourhospital were enrolled，including 11 patients with pathological stages pT1andpT2（lowT-stagegroup）and 22 patientswith stagespT3andpT4（highT-stage group）.Transrectal biplaneultrasoundwasused toobtain tumorthickness， “angularsign”depth，distancefromthelowestboundaryoftherectaltumortotheanalverge，intra-tumoralbloodflowgrade，nd resistance index（RI）.Thediferences inaboveultrasound examinationresults between the two groups werecompared.Receiver operatingcharacteristic（（ROC）curves weredrawn toanalyzethediagnosticeficacyofultrasound examinationresultsforhigh T-stage rectalcancer.ResultsCompared with the low T-stage group，the high T-stage group exhibited increased tumor thickness and“angular sign”depth，with decreasedRI，the differences were statistically significant（all P <0.01）.There were no significantdiferencesindistancefromhelowestboundaryoftherectaltumortotheanalverge，intratumoralbloodflowgrade between thetwo groups.ROC curve analysis showed thattheareaunder thecurves（AUC）for predicting high T-stage rectal cancer were0.907（95%CI：0.804-1.00）for“angularsign"depth，0.769（95%CI：0.579-0.958）fortumorthickness，and0.178 （95%CI：0.029-0.326） for RI.The“angular sign”depth demonstrated the highest AUC，with a sensitivity of 95.5% ，specificity of 63.6% ，and accuracy of 84.8% .Conclusion The“angular sign”depth measured by transrectal biplane ultrasound has certain clinical value in T-staging of rectal cancer.

KEYWORDSTransrectal biplane ultrasound;Rectal cancer;“Angular sign";T-staging

直肠癌是消化系统常见的恶性肿瘤，在消化系统新发恶性肿瘤病例中位居第三。（剩余6637字）