Application value of MSCT tri-phase dynamic enhanced scanning in preoperative staging of gastric cancer and diagnosis of lymphatic metastasis

ObjectiveTo investigate the application value of multislice spiral computed tomography(MSCT)tri-phase dynamic enhanced scanning in the preoperative staging of gastric cancer and diagnosis of lymph node metastasis.

MethodsSixty gastric cancer patients scheduled by operation from January 2015 to January 2018 were selected, and the data of preoperative MSCT tri-phase dynamic enhanced scanning and postoperative pathology in all patients were recorded.The postoperative pathological diagnosis was set as the gold standard, the accuracy of MSCT tri-phase dynamic enhanced scanning in the diagnosis of preoperative staging and lymph node metastasis of gastric cancer was analyzed.The diagnostic efficiency of MSCT tri-phase dynamic enhanced scanning in preoperative staging and lymphatic metastasis of gastric cancer was analyzed using ROC curve.

ResultsThe results of MSCT tri-phase dynamic enhanced scanning in diagnosing the T₁-T₄ staging, lymph node metastasis and M staging were consistent with the pathological diagnosis of gastric cancer(P < 0.01).The overall accuracy rate of MSCT tri-phase dynamic enhanced scanning in preoperative T staging of gastric cancer was 80.00%(48/60), and the accuracy rates of T₁-T₄ staging were 75.00%(6/8), 63.64%(7/11), 86.36%(19/22)and 84.21%(16/19), respectively.The discriminating accuracy rates of T₁ and T₂, T₂ and T₃, and T₃ and T₄ were 68.42%(13/19)and 78.79%(26/33)and 85.37%(35/41), respectively.The overall accuracy rate of MSCT tri-phase dynamic enhanced scanning in the diagnosis of lymph atic metastasis was 85.96%(49/57).The overall accuracy of MSCT tri-phase dynamic enhanced scanning in preoperative M staging of gastric cancer was 89.83%(53/59), and the accuracy of M₀ and M₁ stages was 92.00%(46/50)and 77.78%(7/9), respectively.The ROC curve analysis showed that the area under the curve of MSCT tri-phase dynamic enhanced scanning in the diagnosis of T₁-T₄ staging, lymphatic metastasis and M staging was 0.865, 0.788, 0.853, 0.870, 0.850 and 0.797, respectively, and which was accurate.

ConclusionsMSCT tri-phase dynamic enhanced scanning has important value in preoperative staging, selecting treatment schemes and diagnosing prognosis of gastric cancer, and it is worthy of clinical promotion.