Preoperative Evaluation Using Multidetector Computed Tomography For Vascular Invasion Of Rectal Cancer

Objectives To investigate whether the diameter of superior rectal cancer vein measured by multidetector computed tomography(MDCT)can predict the presence of lymphovascular invasion(LVI)and the influence on prognosis of LVI in patients with rectal cancer.Methods The retrospective case-control study was adopted.The clinical data of 138 patients with rectal cancer.All the patients underwent MDCT examination preoperatively and the diameter of superior rectal vein were recorded from two radiologists’ double-blind independent image-reading to compared with postoperative pathological information.Follow-up was performed by telephone interview and outpatient examination to compare the difference of prognosis.Results The difference of superior rectal vein between the positive LVI group and the negative LVI group were significantly(P<0.05),and two groups of 3-year disease-freesurvival(DFS)and 3-year overall survival(OS)were significantly.In COX regression model,positive LVI is an independent risk factor affecting the 3-year DFS and 3-year OS.Conclusions Positive LVI is an independent risk factor affecting the poor prognosis of patients with rectal cancer after radical resection,which can be predicted by dilated superior rectal vein measured by preoperative MDCT,and help to make individualized treatment strategies.