Preoperative Diagnosis of Gastric Cancer Using Plain Computed Tomography and Dynamic Computed Tomography

Abstract

The accuracy of preoperative diagnosis using computed tomography with or without contrast enhancement in detecting the depth of tumor invasion in the gastric wall and the presence or absence of lymph node metastasis was compared based on histological findings in 94 gastric cancer patients who underwent gastrectomy. The diagnostic accuracy rate of plain CT for gastric wall invasion was less than dynamic CT. Particularly in the evaluation of invasion to another organ, the diagnostic accuracy of dynamic CT was higher (84%) than plain CT (56%). The diagnostic accuracy and sensitivity of dynamic CT for lymph node metastasis was significantly higher than that of plain CT. With respect to the detection of metastasis to group 2 lymph nodes (especially No.(7), (8), (9), (11)), the sensitivity of dynamic CT was higher than that of plain CT. We conclude that dynamic CT is an available preoperative diagnostic procedure for detecting lymph node metastasis and serosal invasion.