Correlation between lymph node metastasis of colorectal carcinoma and vascular pattern of inferior mesenteric artery by CTA
Abstract：Objective To study vascular pattern of inferior mesenteric artery (IMA) by CT angiography (CTA) for colorectal operation. Methods Seventy-seven patients with colorectal carcinoma underwent preoperative IMA CTA from January 2011 to April 2013 in the First Affiliated Hospital of Dalian Medical University were selected randomly. IMA and its branches were reconstructed by VR-r AV technique and divided into different categories. Results All the patients'IMA branched off the abdominal aorta. Four types of branching were confirmed. Type A, where the three arteries branched off from the same point;Type B, where SA branched off from LCA;and Type C, where SA branched off from SRA; Type D, where SA branched off from LCA and SRA respectively. There was no statistical relation between typing and age, gender, invasive depth of tumor, lymph node metastasis, distance from tumor to anus. But lymph node metastasis had significant associated with the distance from tumor to anus (P=0.002). Conclusion Aberrance of IMA is various, metastasis of 242 group lymph nodes was associated with aberrance of SA. Performing preoperative IMA-CTA is helpful to preserve LCA and reduce inadequate lymph node dissection.
Keywords：inferior mesenteric arteryleft colic arterysigmoid arterysuperior rectal arteryCT angiographysigmoid colon cancerrectal cancer
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 756-759 )