To explore the value of enhanced CT and oral contrast-enhanced ultrasonography on preoperative T stage in gastric cancer.

From January 2014 to April 2016, eighty one gastric cancer patients diagnosed by gastroscope underwent abdominal enhanced CT and oral contrast-enhanced ultrasonography 1 week before surgery respectively, to analyze the differences between the two examination methods for evaluation of tumor T staging and postoperative pathological T staging.

Of the 81 patients, stage T1 tumors were found in 7 cases, T2 in 14 cases, T3 in 41 cases, and T4 in 19 cases. Enhanced CT showed 8 cases of stage T1 tumors, 19 of T2, 39 of T3, and 15 of T4; the evaluation accuracy was 76.5%. Gastric window ultrasound contrast examination showed 8 cases of stage T1 tumors, 21 of T2, 39 of T3, and 13 of T4; the evaluation accuracy was 80.2%. The combined two methods were used to evaluate T1 stage tumors in 5 cases, T2 in 16 cases, T3 in 36 cases, and T4 in 24 cases; the evaluation accuracy was 84.0%. The accuracy of combined two methods for evaluating tumor T staging was higher than that of single enhanced CT or ultrasonography (P<0.05). The consistency of predicted T staging and postoperative pathological T staging of gastric window contrast-enhanced ultrasonography was higher than that of contrast-enhanced CT (Kappa: 0.685 vs 0.647).

Combined enhanced CT and oral contrast-enhanced ultrasonography is helpful to evaluate preoperative T staging of gastric cancer patients and to provide strong evidence for early accurate diagnosis of gastric cancer.