Huan Zhang, Presenter: Nothing to Disclose

Zilai Pan MD, Abstract Co-Author: Nothing to Disclose

Lianjun Du, Abstract Co-Author: Nothing to Disclose

Huawei Ling, Abstract Co-Author: Nothing to Disclose

Kemin Chen MD, PhD, Abstract Co-Author: Nothing to Disclose

To assess accuracy of dynamic MSCT (multislice CT), MR (magnetic resonance imaging) and Endoscopic ultrasonography (EUS) in preoperative TNM staging of gastric cancer.

MSCT was performed in 310 cases of gastric cancer diagnosed by biopsy one weeek prior to surgery, among which 72 cases were preoperatively evaluated with both MSCT and EUS and 48 cases were performed with MR and MSCT. All these findings were correlated with the surgery pathological findings.

The accuracy for T-staging detected with MSCT were 80.0%: T1 65.8%, T2 61.5% , T3 88% and T4 85%. The accuracy of MSCT in N staging was 72.2%, (sensitivity 86.0%, specificity 75.0%). The accuracy of MSCT for M staging was 92.7% (sensitivity 69.2% , specificity 97.6%). The overall accuracy in TNM staging was 63.4%. In comparison study of MSCT and EUS, the accuracy for T staging in combination study(82.0% )was higher than that of MSCT and EUS (75.5% and 77.5% respectively) （P0.05）.

MSCT scan is superior in TNM staging in advanced stage. MR can provide more evidences in T2 from T3 or T3 from T4 staging. EUS is outstanding in T staging, but it cannot evaluate the distant lymph node metastasis.

widely used in Ruijin

Zhang, H, Pan, Z, Du, L, Ling, H, Chen, K, Comparative Imaging in TNM Staging of Gastric Cancer.  Radiological Society of North America 2006 Scientific Assembly and Annual Meeting, November 26 - December 1, 2006 ,Chicago IL. http://archive.rsna.org/2006/4430807.html