Table I.

Evaluation of Lauren classification for gastric carcinoma using double contrast-enhanced ultra-sonography (DCUS)

DCUS	Lauren classification
	Diffuse type	Intestinal type
Heterogeneous enhancement	22	4
Homogeneous enhancement	2	30

The proportion of heterogeneous enhancement was significantly different between the diffuse and intestinal types of gastric carcinoma (p = 0.0001). The sensitivity and specificity of heterogeneous enhancement in diagnosing the diffuse type of gastric carcinoma were 92% and 88%, respectively. Youden's index was 0.8