Effect of adding X-ray examination to endoscopy in the assessment of the invasion depth of early gastric cancer

Abstract

In the assessment of invasion depth of early gastric cancer (EGC), the effect of adding X-ray examination to endoscopy was retrospectively investigated in 84 EGC lesions diagnosed at our hospital, including 62 differentiated and 22 undifferentiated lesions. Overall diagnostic accuracy was 75% with endoscopy and 82.1% when X-ray examination was performed in addition to endoscopy. This demonstrated an increase in the accuracy of 7.1% by adding X-ray examination. In terms of presence of ulceration, the additional effect of X-ray examination was higher for lesions without ulceration for both differentiated and undifferentiated lesions. In terms of tumor diameter, the additional effect of X-ray examination was higher for differentiated lesions of ≤30mm and for undifferentiated lesions of ≥21mm. In terms of tumor location, the additional effect of X-ray examination was higher for lesions located in the upper gastric corpus. Depending on the lesion, the addition of X-ray examination to endoscopy contributed to an increase in the accuracy of the assessment of the invasion depth of EGC.