J Korean Radiol Soc.  1994 Aug;31(2):307-312.

Evaluation of Tumor Invasion in Gastric Carcinoma with CT Using Water as an Oral Contrast Agent in Prone Position

• Yoo HS
• Lee BH
• Lee JT
• Chung JI
• Bae JY

Abstract

PURPOSE
To evaluate the accuracy of CT using water as an oral contrast material in a prone position in determining the depth of tumor invasion in gastric cancer patients.
MATERIALS AND METHODS
Thirty three patients(19 male, 14 female) with surgically confirmed gastric cancer were studied. We performed CT in a prone position after ingestion of 1 liter of pure water. CT findings were classified into 4 groups by the morphologic appearances of infiltrates in the perigastric fat plane :normal perigastric fat(SO), fine mottled densities(S1), irregular aggregated or linear densities(S2) and direct extension and invasion of tumor into contiguous structures(S3). Also we prospectively compared the CT staging with pathologic T staging according to the TNM systems.
RESULTS
The overall accuracy of CT staging in determining the pathologic T factor was 69.6%. As we regarded T1 and T2 lesions as one group on CT, the accuracy of CT staging was increased to 80.2% because of a limitation of CT for distinguishing T1 from T2 lesions.
CONCLUSION
Prone position CT using water as an oral contrast agent is quite accurate in determining the T staging of gastric carcinoma.

MeSH Terms

Eating
Humans
Male
Prone Position*
Prospective Studies
Stomach Neoplasms
Water*
Water