Semiotics and the role of transrectal ultrasound in rectal cancer staging

Transrectal ultrasound (TRUS) is inexpensive and simple method for examining the rectum and surrounding tissues. In particular it is used to preoperatively assess stage, in patients with rectal cancer. By using TRUS is possible to analyze the neoplasm extent, depth of tumor invasion into the layers of the colon wall, the mesorectal lymph node involvement and the circumferential resection margin. This method is comparable to an expensive magnetic resonance imaging scan, and if done correctly could even exceed it. The correct diagnosis, especially in the early stages of the disease, plays an important role in choosing surgical treatment in future. However, to interpret the results, you must be familiar with the anatomy of the rectum and anal canal, as well as follow the simple rules for the preparation and implementation of TRUS. If you follow all the rules, you can answer the question about the possibility of performing organ-preserving surgery and compliance with cancer radicalism.