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Published on: February 13, 2026
Endoscopic mucosal resection for rectal carcinoids under micro-probe ultrasound guidance
Fu-Run Zhou1, Liu-Ye Huang, Cheng-Rong Wu
1Department of Gastroenterology, Yu Huang Ding Hospital affiliated to Qingdao University School of Medicine, Yantai 264000, Shandong Province, China. frz_1205@126.com
Aim:
To assess the therapeutic value of endoscopic mucosal resection (EMR) under micro-probe ultrasound guidance for rectal carcinoids less than 1 cm in diameter.
Methods:
Twenty-one patients pathologically diagnosed with rectal carcinoids following colonoscopy in our hospital from January 2007 to November 2012 were included in this study. The patients consisted of 14 men and 7 women, with a mean age of 52.3 ± 12.2 years (range: 36-72 years). The patients with submucosal tumors less than 1 cm in diameter arising from the rectal and muscularis mucosa detected by micro-probe ultrasound were treated with EMR and followed up with conventional endoscopy and micro-probe ultrasound.
Results:
All of the 21 tumors were confirmed by micro-probe ultrasound as uniform hypoechoic masses originating from the rectal and muscularis mucosa, without invasion of muscularis propria and vessels, and less than 1 cm in diameter. EMR was successfully completed without bleeding, perforation or other complications. The resected specimens were immunohistochemically confirmed to be carcinoids. Patients were followed up for one to two years, and no tumor recurrence was reported.
Conclusion:
EMR is a safe and effective treatment for rectal carcinoids less than 1 cm in diameter.
Insights
Endoscopic mucosal resection (EMR) effectively treats small rectal carcinoids. This minimally invasive procedure, guided by micro-probe ultrasound, demonstrated a high success rate with no recurrence in patients with tumors under 1 cm.
Area of Science:
- Gastroenterology
- Surgical Oncology
- Medical Imaging
Background:
- Rectal carcinoids are neuroendocrine tumors.
- Early detection and treatment are crucial for favorable outcomes.
- Small rectal carcinoids (<1 cm) pose diagnostic and therapeutic challenges.
Purpose of the Study:
- To evaluate the efficacy and safety of endoscopic mucosal resection (EMR) for treating rectal carcinoids.
- To assess the role of micro-probe ultrasound guidance in EMR for these tumors.
Main Methods:
- A study included 21 patients diagnosed with rectal carcinoids.
- Tumors were characterized using micro-probe ultrasound.
- Endoscopic mucosal resection (EMR) was performed under ultrasound guidance.
Main Results:
- Micro-probe ultrasound confirmed 21 tumors as hypoechoic masses originating from the rectal mucosa.
- EMR was successfully completed in all cases without complications such as bleeding or perforation.
- Follow-up for 1-2 years revealed no tumor recurrence.
Conclusions:
- Endoscopic mucosal resection (EMR) is a safe and effective therapeutic option for rectal carcinoids.
- Micro-probe ultrasound guidance enhances the precision of EMR for small rectal carcinoids.
