The presence of fecal and bloody discharge in the vagina is due to the fact that the cancer of the anterior rectal wall in women can infiltrate the posterior vaginal wall when it penetrates the intestinal wall, causing increased leucorrhea; if it penetrates the posterior vaginal wall, it forms a rectovaginal fistula, thus causing fecal and bloody discharge in the vagina. This is one of the clinical symptoms of rectal cancer. Then, what are the tests for fecal and bloody discharge in the vagina? The following will be introduced for you. 1.Fecal routine + occult blood: it can be used as a simple screening index. If the occult blood is positive, further examination is needed to understand the situation of digestive tract (stomach, small intestine, large intestine and rectum). 2.Tumor marker examination: there are two main markers for colorectal cancer: CEA and CA-199, which should be noted whether there are liver or lung metastases if they are elevated before surgery. 3, colonoscopy: patients who have no problems with rectal diagnosis should not relax their vigilance, and further colonoscopy is feasible to understand the situation of the rectum and large intestine that cannot be reached by finger diagnosis. If you do not want to perform colonoscopy, barium enema is feasible (note that before performing colonoscopy or barium enema, you must exclude the presence of intestinal obstruction, such as intestinal obstruction is prohibited to take laxatives to prepare the intestines). 4, chest X-ray or chest X-ray: exclude the presence of lung metastases. 5.Liver ultrasonography or abdominal CT examination: exclude any liver metastasis. 6.Pelvic CT or magnetic resonance imaging (MRI): check to understand the tumor infiltration and the presence of pelvic lymph node metastasis. 7.Anal stool control function test: this test is needed to understand the anal stool control function before internal sphincter resection surgery.