CT in Diagnosis of Infiltrative Gastric Carcinoma

Purpose To analyze the CT features of the infiltrative gastric carcinoma, and to improve its diagnosis. Materials and Methods CT manifestations of 30 patients with infiltrative gastric carcinoma confirmed by pathology were analyzed retrospectively, and post-processing included multi-planner reformation(MPR), maximum intensity projection(MIP) and CT virtual endoscopy(CTVE) were applied for further observation. Results Twenty-two lesions located in local gastric areas, 8 cases involved more than two gastric areas; the maximum thickness of the infiliative gastric carcinoma was(30.10±1.34) mm. Eleven cases observed deep and shallow ulcer lesions, 19 cases observed narrowed gastral cavity. Nine cases showed uniform enhancement of thickened gastric wall and tumor, 21 cases showed uneven enhancement(including layered enhancement). For 30 cases, 26 cases had lymph node enlargement around stomach, 2 cases involved 2 gastric areas. One case was squamous carcinoma; and 29 cases were adenocarcinoma, including 5 well-differentiated, 14 poorly-differentiated, 9 undifferentiated type and 1 myxoadenocarcinoma. The enhancement features showed statistical difference between well-differentiated adenocarcinoma and poorly-differentiated adenocarcinoma as well as undifferentiated adenocarcinoma(χ2=3.35, P0.05). Conclusion MSCT plain and enhanced scan and the application of MPR, MIP, CTVE are important for the early diagnosis of infiltrative gastric carcinoma.