The price of transrectal ultrasound examination varies according to the level of the hospital, the region where the hospital is located, and the instruments used by the hospital. In general, the price of rectal ultrasound examination in a tertiary hospital is about 200 yuan. The rectal ultrasound examination is to put the probe into the rectum to observe the lesions in the rectum. Before the rectal ultrasound examination, it is necessary to remove the lodged stool in the intestine and an enema is required. Rectal ultrasound can observe whether there are rectal polyps, whether there are perianal abscesses and whether the abscesses form sinus tracts. Rectal ultrasound can also observe the tumors in the intestinal cavity, such as the size of the tumors, the level of invasion of the intestinal wall, whether they invade the muscular layer and plasma layer of the intestinal wall, and whether there are metastases outside the intestinal tract, which is of great significance to the staging of rectal cancer. Rectal ultrasound is an indispensable clinical examination tool.