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目的：探讨两种ＵＳ检查方法对直肠癌术前分期的准确性及其临床应用价值。材料和方法：４５例直肠癌患者行ＵＳ检查，其中２１例行直肠腔内ＵＳ检查（ＥＲＵＳ），另外２４例无法行ＥＲＵＳ（硬质腔内探头）的直肠上段癌或伴有肠腔狭窄的直肠癌患者行直肠内灌水经腹部ＵＳ检查，其中５例女性患者同时行经阴道ＵＳ检查，ＵＳ检查结果与手术及病理对照。结果：直肠内灌水经腹部ＵＳ检查对直肠癌术前分期的准确率为７５％，与ＥＲＵＳ的分期准确率７６．２％相近，直肠内灌水经腹部ＵＳ检查还可用于检查结肠疾病。对女性患者，经阴道ＵＳ检查也可以清晰显示直肠癌的侵犯范围。结论：直肠内灌水经腹部ＵＳ检查是直肠腔内ＵＳ较理想的替补方法，对女性直肠癌患者，经阴道ＵＳ检查亦有较高价值。
Objective: To investigate the accuracy and clinical value of two US examinations in the preoperative staging of rectal cancer. Materials and Methods: Forty-five patients with rectal cancer underwent US examination. Twenty-one patients underwent rectal US examination (ERUS). Another 24 patients who were unable to perform ERUS (hard endoluminal probe) or upper rectal cancer or had intestinal stenosis. Patients with rectal cancer underwent transrectal irrigation via abdominal US examination. Five of the female patients underwent transvaginal US examination at the same time. US examination results were compared with surgery and pathology. RESULTS: The accuracy of preoperative staging of rectal cancer was 75% in the rectal US by rectal irrigation and similar to the 76.2% in the stage of ERUS. Rectal rectal examination was also used to detect colon disease. In female patients, transvaginal US examinations can also clearly show the extent of colorectal cancer invasion. CONCLUSIONS: Rectal US examination of intra-abdominal irrigation is an ideal alternative for intrarectal US. For women with rectal cancer, transvaginal US examination also has a higher value.