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Imaging characteristics and the invasion, abdominal metastases of gastric cancer with MDCT
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Abstract
SUMMARY
Purposes: Describe imaging characteristics and assess value of MDCT in evaluating the invasion, abdominal metastase of gastric adenocarcinoma based on the 7 th AJCC guidelines.
Materials and methods: From 4/2014 to 3/2015, there are 32 consecutive patients with gastric adenocarcinoma were undergone 64-slide-CT. All of them were undergone operation with pathology after surgery.
Results: The average age is 63 years old, and male/ female=2/1. In 37.2% of cases gastric carcinoma is located on antrum. About macroscopic type, the forth type (linitis plastica) rates are highest 68.8%. The thickness of gastric cancer is pricipal 15-19 mm, all of cases heterogeneous enhancement. There are
17 cases invasion adjacent organs, in which tranverse colon is 8 cases and pancreas is 7 cases. Evaluating the value of diagnosis
peritoneal metastase between MDCT and surgical resection is appropriated with medial level Kappa = 0.53, the sensitivity is 75%, the specificity is 89.3%. The overall accuracy of T staging is 62.5% (T1 66.7%, T2-T3 69.2%, T4a 44.4%, and T4b 71.4%). Diagnosis lymph nodes metastasis based on the diameter has got the low valuation with p>0.05, based on the short axis diameter is < 8mm and ≥8mm has got p <0.05. About the shape of lymph nodes, based on irregular shape, peripheral enhancement and round shape to evaluate metastasis with p <0.05.
Conclusion: MDCT with multi-planar reformatted images has increased the accuracy of T and N staging, evaluated the invasion, abdominal metastase of gastric cancer on MDCT.
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References
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