Imaging Analysis Of Supplying Arteries Of Colorectal Cancer With MSCT

Objectives 1 Using MSCT,to analyze the origin and the branches of feeding arteries of colorectal cancer.2 To compare the diameter and branches of superior mesenteric artery and inferior mesenteric artery between tumor group and non-tumor group,and to compare the diameter and straight arteries of specific arteries involved in supplying colorectal cancer between the tumor group and the non-tumor group.Methods 103 cases of colorectal cancer were collected as the tumor group,who were diagnosed by pathology in present hospital from September 2019 to December 2020,and the preoperative thin-layer arterial images of the patients were treated with vascular post-treatment using ADW4.7 workstation.The origins of IMA and SMA were observe and recorded,as well as the origins and branches of RCA,MCA,LCA,SA and SRA.Cases in tumor group were divided into SMA blood supplying group and IMA blood supplying group according to the artery involved in supplying colorectal cancer came from superior mesenteric artery or inferior mesenteric artery.70 cases without colorectal cancer treated in the same period were selected as the non-tumor group,the diameters of SMA,IMA were compared.According to the specific artery involved in supplying colorectal cancer,cases in the tumor group were divided into ICA blood supplying group,RCA blood supplying group,MCA blood supplying group,LCA blood supplying group,SA blood supplying group and SRA blood supplying group,the diameter and the number of straight arteries of the specific artery involved in supplying colorectal cancer were compared with that in the non-tumor group,respectively.Results In 103 cases of colorectal cancer accepted in the study,SMA cooperated with the celiac trunk in 2 cases,SMA originated from the same point in abdominal aorta as the celiac trunk in 1 case,while the other SMA originated from the abdominal trunk alone.Regarding the feeding arteries originating from superior mesenteric artery,ICA was absent in 1 case,accounting for 0.97%.RCA was absent in 34 cases,accounting for 33.00%.Two right colonic arteries were found in 3 cases,accounting for 2.91%.MCA was absent in 5cases,accounting for 4.85%.Two middle colonic arteries were found in 13 cases,accounting for 12.62%.Three middle colonic arteries were found in 1 cases,accounting for0.97%.The MCA in 5 patients only supplied blood for the transverse colon,accounting for 4.85%,and the branches of MCA supplied transverse colon and Hepatic region of colon in 93 patients,accounting for 90.29%.5 patterns were found about inferior mesenteric artery distributing feeding arteries.SA cooperated with SRA or LCA in most cases.Secondly,several SA originated from SRA and LCA respectively.And these three patterns accounted for 85.43%.The number of branches from SRA is 5.21,and the number of branches from SA,LCA,ICA,MCA and RCA is 3.35,2.66,3.41,2.84,2.97,respectively.The diameter in the superior mesenteric artery supplying group was larger than that in the non-tumor group(P<0.05),and the difference was statistically significant.The diameter in the superior mesenteric artery supplying group was larger than that in the non-tumor group(P<0.05),and the difference was statistically significant.The diameter of the supplying arteries in the SA supplying group,SRA supplying group and RCA supplying group was larger than that in the non-tumor group,and the number of straight arteries originating from the supplying arteries was larger than that in the non-tumor group(P<0.05),and the difference was statistically significant.Conclusions 1 Origin variations of SMA are rare,but origin variations of colonic supplying arteries are common.The origin variations of RCA are the most common,and RCA are mainly absent in most cases.The second common is the origin variation of MCA,and the origin variation of ICA is rare.2 IMA originates from abdominal aorta alone in all cases.There are few variations in the origin of colorectal supplying arteries originating from IMA,among which the most common is the presence of multiple SA branches.The second common is the absence of LCA.The branching patterns of IMA are variable.In the vast majority patterns,SA cooperates with LCA or SRA,or multiple SA originate from LCA and SRA.3 In colonic supplying arteries,the number of branches of SRA is the largest,demonstrating that local vascular anatomy of SRA is most complex.And the number of branches of LCA is the smallest,suggesting that surgeons should keep more branches when they bare blood vessels during surgery to maintain the blood supply of colon.4 The superior mesenteric artery,the inferior mesenteric artery are significantly thickened in tumor patients.There are more straight arteries in colorectal cancer.And the feeding arteries of the colorectal cancer are significantly thickened,when RCA,SA and SRA are involved in supplying colorectal cancer.Figure 4;Table 27;Reference 61...