CAJ | 학술논문

AIM:To determine the accuracy of 1.5-T magnetic resonance imaging (MRI) in the evaluation of gastric wall invasion and perigastric lymph node metastasis in gastric adenocarcinoma.METHODS:Twenty resected gastric specimens containing 20 tumors were studied with a 1.5-T MR system using a commercial head surface coil.MR scanning was performed with a T1 weighted image (TR/TE=500/20),and a T2 weighted image (TR/TE=2500/90).MR findings were compared with pathologic findings.RESULTS:A T1-weighted image demonstrated three layers in the normal gastric wall.All of the gastric tumors were well demonstrated by lesions and location.In a MRI findings of gastric wall invasion,there was 1 case of T1,7 of T2,11 of T3.Pathologic results of resected specimens included 3 cases of pT1,4 of pT2,and 12 of pT3.The accuracy of T staging with MRI was 74% (14 of 19).MRI findings of lymph node metastasis included 6 cases of N0,13 cases of N1.The accuracy of the N staging with MRI was 47% (9 of 19).CONCLUSION:MRI has a high diagnostic accuracy in the evaluation of the T staging of gastric cancer in vitro and thus potentially enables preoperative histopathologic staging.