Rectal Neuroendocrine Tumor
Conditions
Brief summary
According to clinical practice and relevant retrospective research data, both modified cap-assisted endoscopic mucosal resection (mEMR-C) and endoscopic mucosal resection with a ligation device(ESMR-L) were reported to be effective for the treatment of small rectal neuroendocrine tumors (NETs) . However, there is a lack of multicenter prospective studies to evaluate the advantages and disadvantages of mEMR-C and mEMR-L. mEMR-C is the modified ESMR-L without submucosal injection.
Detailed description
We aimed to conduct a muticenter randomized controlled trial to compare mEMR-C with mEMR-L for the treatment of small rectal neuroendocrine tumors (NETs) in ten tertiary hospitals in China.
Interventions
PROCEDUREmEMR-C procedure
A transparent cap with an inner groove (MH-593; Olympus, Tokyo, Japan) was attached to the forward-viewing colonoscope. After the endoscope was inserted into the rectum, a crescent-shaped electrosurgical snare was passed through the sheath and looped along the inner groove of the cap. Submucosal injections were not required in this method. The tumor was suctioned into the cap and grasped by tightening the snare. After confirming the appropriate snare placement, both the tumor and overlying mucosa were resected using electric cautery (Endocut Q, effect 2, VIO 200D; ERBE, Tübingen, Germany), and the resected tumor was sent for pathological examination. Endoscopic examination was repeated without a transparent cap to evaluate the wound carefully in cases of perforation or bleeding and to ensure the absence of residual tumor tissues. If there was spurting or active bleeding, hot forceps were used to stop the bleeding.
PROCEDUREmEMR-L procedure
First, install the ligation device (provided by Jiangsu Gerrit) at the front end of the endoscope. After inserting the endoscope into the rectum, suck the lesion into the ligation device, release the ligator to ligate the lesion. Then, use a snare to resect the lesion below the ligator. Finally, uniformly suture the wound surface with metal clips.
Sponsors
Guangdong Provincial People's Hospital
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
No
Inclusion criteria
1. Age from 18 to 80 years; 2. With a high suspicion or evidence of rectal NET assessed using EUS or colonoscopy; 3. With tumor size ≤10 mm assessed by colonoscopy; 4. Plan to receive mEMR-C or mEMR-L treatment and provide written informed consent;
Exclusion criteria
1. Unable to tolerate mEMR-L or mEMR-C as assessed by the research team of each center; 2. Complicated with serious diseases such as malignant tumor, which may lead to shorter life expectancy, the research team considers that it is not suitable for inclusion in the study after comprehensive evaluation; 3. Rectal NET with lymph node metastasis or distant metastasis; 4. Received resection of rectal neuroendocrine tumor by other surgical procedures; 5. Multiple rectal neuroendocrine tumors; 6. Vulnerable groups such as pregnant women or patients with mental disorders; 7. Poor compliance, unable to cooperate with treatment.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| histological complete resection | within 14 days after procedure | complete single-piece (en bloc) resection of the targeted lesion with horizontal and vertical free margins. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| en bloc resection | intraoperative | complete single resection of the targeted lesion, irrespective of whether the basal and lateral tumor margins were infiltrated or undetermined |
| operation time | intraoperative | the time required to complete the procedure, was taken from the installation of the snare in the mEMR-C or the first submucosal injection in ESD to the end of complete resection of the targeted area or a failure or complication of the procedure which required discontinuation |
| complications | within 14 days after procedure | perforation or hemorrhage during or after operation |
| success rate of operation | intraoperative | the proportion of patients whose tumors were successfully resected in each group |
| hospitalization cost | within 14 days after procedure | represent the hospital's costs of being hospitalized |
| operation cost | within 14 days after procedure | the cost of mEMR-C or mEMR-L procedures, except the cost of other endoscopic procedures |
| histopathologic grade | within 14 days after procedure | NET grade 1, NET grade 2, NET grade 3, and NEC |
| length of stay | within 14 days after procedure | calculated from the day of admission to day of discharge |
Outcome results
None listed