Rare rectal gastrointestinal stromal tumor case: A case report and review of the literature

Figure 2 Imaging examinations show the location of the rectal gastrointestinal stromal tumor. A: The colonoscopy results show that the tumor originated from the rectal dentate line; B: The results of trans-rectal ultrasound show that the tumor protruded from the posterior of the rectum submucosa; C and D: The results of pelvic magnetic resonance imaging revealed that the tumor (pentagram) was located in the rectum submucosa.