The value of double contrast-enhanced unltrasonography in macroscopic classification of rectal carcinoma / 中华医学超声杂志（电子版）

ABSTRACT

Objective To investigate the clinical value of double contrast-enhanced ultrasonography (DCUS) in the macroscopic classification of rectal carcinoma. Methods Seventy-one patients with rectal carcinoma were examined by ultrasound after intrarectal infusion and intravenous bolus injection of SonoVue preoperatively. And three types were divided according to the shape of the tumorprotruding type, ulcerative type and invasive type. After surgery, DCUS and perfusion contrast-enhanced ultrasonography (PCUS) were compared with final pathologic results respectively, and the relationship between general tumor type and TN staging were analyzed.Results The accuracy of DCUS [88.7%(63/71) ] in macroscopic classification of rectal carcinoma was significantly higher than that of PCUS [73.2%(52/71) ](χ2=5.534,P<0.05). For the invasion depth into the intestinal wall, the protruding type was mainly in T1, T2 and T3 stages while ulcerative and invasive type in T2, T3 and T4 stages (χ2=12.322, P<0.05 ). For the stage of lymph node, the protruding type was mainly in N0 and N1 while ulcerative and invasive type in N1 and N2(χ2=6.733,P < 0.05 ). Conclusions DCUS, with its high accuracy, is a new valuable method for macroscopic classification of rectal carcinoma.In the aspect of intestinal wall invasion and the lymph node, protruding type is less severe than ulcerative type and invasive type.