Usefulness of Additional Prone pad compression Study in Upper Gastrointestinal Series for Detecting EarlyGastric Cancer

Noh, Han Na; Ha, Hyun Kwon; Bae, Sang Jin; Ham, Soo Youn; Lee, Jong Hwa; Kim, Pyeo Myun; Lee, Moon Gyu; Auh, Yong Ho

Abstract

PURPOSE: To evaluate the usefulness of prone pad study in upper gastrointestinal series(UGIS) for thedetection of early gastric cancer(EGC).
MATERIALS AND METHODS
During an eight-month period, 88 of 170 patientswho underwent gastrectomy due to EGC were also the subjects of prone pad study as well as double contrast(n=92),mucosal relief(n=76), or compression(n=91) studies. The EGCs were single in 84 patients and double in four. Wecompared prone pad study with the three other techniques for detecting a tumor and depicting the surroundingmucosal changes. Lesional conspicuity was rated 'complete', 'incomplete','suspicious'. or 'undetected'. Thedepiction of surrounding mucosal change was rated 'excellent', 'good', 'fair', or 'poor'.
RESULTS
Mean tumorsize was 3.2cm, with a range of 0.3-9cm. Tumors were located in the antrum(n=55), angle(n=13), lower or midbody(n=16), or the sign body and cardia(n=5). Among the 92 EGCs evaluated, UGIS missed the lesion in threecases(sensitivity, 97%). The rates of 'complete' lesional conspicuity were 49% inn prone pad, 29% in compression,20% in double contrast, and 9% in mucosal relief. The rates of excellent' in depicting surrounding mucosal changewere 45% in prone pad, 11% in double contrast, 9% in mucosal relief, and 9% in compression. The tumor wasdemonstrated only in prone pad study in five(5%) of the 92 EGCs.
CONCLUSION
prone pad study during UGIS improvesboth the detection rate of EGC and the depiction of mucosal change around the tumor.