Left Gastric Artery Lymph Node After Radical Operation Of Gastric Cancer Localization In The Spiral Computer Tomography (CT)

Objective:To measure and define the region-wide of left gastric artery lymph nodes, to guide radiotherapy target volume delineation after radical operation of gastric cancer.Methods:Titanium clips were set around the root left gastric artery in 36 patients with gastric carcinoma at the time of surgery. Under the spiral Computer Tomography(CT), enhancement scanning were taken in the radio-therapeutic position, the coronal view and sagittal view were reconstituted. Then, T12 vertebral body as reference point, measurement of left gastric artery lymph nodes in the three-dimensional direction. With SPSS 17.0 software, range of variation of localization of the root of left gastric artery lymph nodes were obtained.Results:According to the analysis of Kolmogorov-Smirnov test, each border was of approximate normal distribution, Male and female groups in the left gastric artery lymph nodes on the distribution of the trend is consistent. Pearson Correlation Coefficients analysis did not suggest a significant relationship between the border and age, height, weight and size of vertebral body. The anterior boundary’s most leading edge perpendicular to the T12 vertebral body tangent of male and female left gastric artery lymph nodes were 46.56±1.95mm,37.56±2.35mm; the posterior boundary is respectively 17.50±2.02mm,16.44±2.34mm; the left boundary is respectively from the T12 vertebra left margin, right 22.48±2.04mm,16.03±2.25mm; the right boundary is respectively from the T12 left margin, left 14.33±2.12mm,5.53±2.35mm; the upper bound respectively from the T12 vertebral body on the edge of 26.89±2.12mm, 16.09±2.30mm; the lower bound respectively from the T12 vertebra body lower edge,9.58±2.13mm,8.58±2.36mm.Conclusion:Male and female left gastric artery lymph node in spiral CT in the range are approximately perpendicular to the T12 vertebral body: former world foremost edge tangent 48.51mm,39.91mm; T12 vertebral body after circles perpendicular to the front line 15.48mm,14.10mm; left the sector from the T12 vertebra left margin of the right 24.52mm,18.28mm; T12 vertebral body right sector from the left margin left 16.45mm,7.88mm; Upper bound of T12 from the vertebral body on the edge of 29.01mm, 18.39mm; lower bound from the T12 vertebral body lower edge,11.71mm, 10.94mm.