Comparison and Analysis for CT Findings of Gastric Adenocarcinoma and Gastric Lymphoma

ABSTRACT

PURPOSE: The purpose of this study is to analyze and compare the CT findings of gastric adenocarcmoma and gastric lymphoma. MATERIALS AND METHODS: We retrospectively analyzed and compared the CT findings in 46 cases of adenocarcinoma and 12 cases of lymphoma, which were pathologically confirmed by operation and endoscopic biopsy. RESULTS: Antral involvement was more common in adenocarcinoma(71.7%) than in lymphoma(41.7%). Localized involvement was more common in adenocarcinoma(83.7%), while diffuse involvement was more common in lymphoma(55.6%). Adenocarcinoma tended to have smooth inner margin(83.8%), while lymphoma had nodular or irregular inner margin(36.4%). Mean gastric wall thickness of adenocarcinoma was 1.7cm, while mean thickeness of lymphoma was 2.7cm. The involved wall of adenocarcinoma tended to be highly enhanced (59.5%), while lymphoma was moderately enhanced(90.1%). Perigastric lymphadenopathy was present in 40% (group I) and 42%(group II) of adenocarcinoma and 33% of lymphoma(group I and II). Three cases of lymphoma had lymphadenopathy below renal vascular pedicles with no or minimal perigastric lymphadenopathy. When only the distal portion of the stomach was involved, disturbance in passage developed in six adenocarcinoma (12%), while none developed in the lymphoma. CONCLUSION: CT features help to differentiate between gastric adenocarcinoma and gastric lymphoma