Helical CT evaluation in the preoperative staging of gastric adenocarcinoma.

INTRODUCTION

The aim of this study is to evaluate helical CT as a basic preoperative test for the staging of gastric adenocarcinoma.

MATERIAL AND METHOD

We enrolled 50 patients with a diagnosis of gastric adenocarcinoma, evaluated helical CT scans, and compared their findings to the microscopic, pathology-confirmed ones obtained by laparotomy. UICC's TNM classification, 5th edition (May 1997), was used.

RESULTS

Best results regarding Sensitivity were obtained in the diagnosis of lymph node disease (83%; 69-92%); regarding specificity we obtained 92% (79-98%) for T4, and 89% (77-96%) in metastasis detection. Accuracy was 70% for T1-T2, and 62% for T3.

CONCLUSIONS

1. For the T category, helical CT effectively detects advanced cases classified as non-resectable. 2. For the N category, helical CT prediction is better than ever before with previous CT generations. 3. For the M category, helical CT is a useful test to identify the presence of liver metastases that would render surgery unnecessary.