Application Of Double-plane Transrectal Ultrasound Combined With Ultrasound Contrast In Preoperative T-Staging Of Rectal Carcinoma

Objective: Colorectal disease is more common digestive diseases, the incidence of colorectal cancer has an upward trend in recent years, now has become one of the common malignant tumors, because the majority of patients have no symptoms early, mostly diagnosed late, so the colorectal cancer’s correctly preoperative T staging is the key of treatment.To evaluate the value of double-plane transrectal ultrasound combined with contrast preoperative T staging of rectal carcinoma. Methods: Retrospective analyse 75 patients with pathologically confirmed rectal carcinoma then staged by double-plane transrectal ultrasound(TRUS) combined with contrast and multislice spiral CT(MSCT) examination, Observe the location of the tumor boundary, internal echo, Mode of enhancement and internal tumor microcirculation after contrast, Rectal wall thickness and density changes under MSCT scanning, comparing the diagnostic results with pathological results. Results: The accuracy of TRUS combined with contrast and MSCT in determining the T staging of colorectal cancer were 84% and, the accuracy were(T1 75%, T2 75%, T3 97.1%, T4 66.7%) and(T1 8.3%、T2 60%、T3 47.2%、T4 71.4%), the specificity were(T1 100%, T2 92.7%, T3 82.1%, T4 98.1%) and(T1 100%、T2 50.9%、T3 74.3%、T4 95.5%) respectively. There was statistically significant between the two methods. Conclusions: TRUS combined with ultrasound contrast can clearly observe tumor invasion of the rectum intestinal level, Internal tumor microcirculation and blood supply, and has more significant diagnostic advantage In rectal cancer preoperative T staging.