Fig. 4 Pathology. Multifocal mucus paste (red arrows) visible in the intestinal wall, locally covered with intestinal epithelium without heterogeneous hyperplasia (blue arrows).
CASE 2
A 27 years old female patient had a change in stool habits and traits for more than 2 years, which showed that the frequency of defecation increased to 5-6 times a day, and the stool became slightly thinner, accompanied by a feeling of urgency and incompleteness of the stool, and mucus on the surface of the stool. Colonoscopy was performed at a local hospital, which showed that a mucosal eminence of about 2 × 2.5cm in the rectum 2-4cm from the anus. Biopsy under colonoscopy showed chronic inflammation of the mucosa with erosion. No further treatment was performed and no follow-up examination was conducted. Recently, the stool surface was mixed with blood, so he came to the hospital for diagnosis and treatment.
DRE: A tough mass about 2-3cm in diameter could be detected on the anterior wall of the rectum about 6cm from the anus, with moderate mobility, slight tenderness, and no blood staining after exiting the finger sleeve. Laboratory examination: Blood routine, liver and kidney function, tumor markers were all in normal range.
ERUS: a cystic mass was seen in the submucosal layer of the rectum at 10-12 o’clock in the lithotomy position about 56 mm from the anal verge, with size of 26 mm in diameter, clear borders, regular morphology, intact mucosal layer, intact and continuous intrinsic muscular layer and serous layer. CDFI: a small amount of blood flow signal was seen in the periphery, and no significant blood flow signal was seen inside (Figure 5).