Safety and Efficacy of Underwater Endoscopic Mucosal Resection for Type I Gastric Neuroendocrine Tumors Measuring 5-9 mm (POEM)
Safety and Efficacy of Underwater Endoscopic Mucosal Resection for Type I Gastric Neuroendocrine Tumors Measuring 5-9 mm: A Prospective Single-Centre Cohort Study
Study objectives:
Primary objective:
1.To determine the histologic R0 resection rate of UEMR for type I gastric NETs measuring 5-9 mm.
Secondary objectives:
To evaluate:
- En bloc resection rate
- Immediate and delayed adverse events
- Procedure time
- Histologic quality of resection (deep and lateral margins)
- Residual disease at resection scar on surveillance endoscopy oMetachronous gastric NETs during follow-up
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
Study design This is a prospective, single-centre, single-arm cohort study evaluating UEMR for type I gastric NETs. Outcomes will be assessed at the lesion level, with statistical methods accounting for clustering of multiple lesions within individual patients.
Study population Inclusion criteria Patient-level
- Age ≥18 years
- Fit for endoscopic therapy and sedation
- Written informed consent Lesion-level
3.Endoscopically visible gastric neuroendocrine tumor 4.Size 5-9 mm (endoscopic estimation) 5.Clinical and/or histologic features consistent with type I gastric NET 6.No endoscopic features suggestive of deep invasion 7.Technically amenable to snare resection Exclusion criteria
Lesion-level
- Lesions <5 mm (managed with surveillance in routine practice)
- Lesions ≥10 mm
- Type II or type III gastric NET
- Evidence of muscularis propria invasion on EUS
- Distant metastasis or nodal disease on DOTANOC PET-CT
- Prior attempted resection at the same site with significant fibrosis
- Non-lifting lesion due to scarring
Patient-level
- Uncorrectable coagulopathy
- Inability to manage antithrombotic therapy as per guidelines
- Pregnancy
- Inability to provide informed consent
Pre-procedure evaluation
- Detailed clinical assessment and laboratory work-up as per institutional protocol
- Endoscopic documentation of:
- Lesion size, location, morphology
- Number of lesions
- Background mucosal atrophy
- EUS performed for lesions ≥8 mm, atypical morphology, or suspected deeper invasion
- DOTANOC PET-CT performed where clinically indicated to exclude metastatic disease
Intervention: Underwater EMR technique
- Standard diagnostic gastroscope
- Minimal insufflation followed by complete deflation of the gastric lumen
- Lumen filled with normal saline to achieve complete submersion of the lesion
- Optional marking for flat or ill-defined lesions
- Snare capture with a 1-2 mm margin under water
- Resection using standardized electrosurgical settings
- Defect management (clips or coagulation) at endoscopist discretion
- Retrieval of intact specimen
- Specimen orientation and pinning on cork for histopathologic assessment
Histopathologic assessment:
All specimens will be evaluated by experienced gastrointestinal pathologists.
Reported parameters:
- Tumor size
- Tumor grade and Ki-67 index
- Depth of invasion
- Lateral and vertical margins
- Lymphovascular invasion
- Resection status classified as:
- R0: negative lateral and vertical margins
- R1: microscopic margin positivity
- Rx: indeterminate margins
Outcome measures Primary outcome
- R0 resection rate per lesion Secondary outcomes
- En bloc resection rate
- Immediate bleeding (requiring endoscopic hemostasis)
- Delayed bleeding (within 14 days requiring medical attention)
- Perforation
- Procedure time (scope insertion to removal)
- Residual disease at scar on surveillance endoscopy (3-6 months)
- Metachronous lesions during follow-up
Follow-up protocol
- Clinical follow-up at 24-72 hours and at 14 days
- Surveillance endoscopy at 3-6 months post-resection
- Further surveillance as per institutional protocol for type I gastric NETs
Undersøgelsestype
Undersøgelsestype
Tilmelding (Anslået)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiekontakt
Studiekontakt
- Navn: Rajesh Mr Goud, M.Pharmacy
- Telefonnummer: 103 04023378888
- E-mail: rajeshgoud761@gmail.com
Undersøgelse Kontakt Backup
- Navn: Shashavali Dr Maniyar, MD
- Telefonnummer: 105 04023378888
- E-mail: shashimaniyar@gmail.com
Studiesteder
-
-
Telangana
-
Hyderabad, Telangana, Indien, 500082
- Rekruttering
- Asian Institute of Gastroenterology/AIG Hospitals
-
Kontakt:
- Dr SHASHEENDRA YANAGANDULA, MBBS MS
- Telefonnummer: 9676050769
- E-mail: shasheendra8@gmail.com
-
Kontakt:
- Dr Mohan Ramchandani, MBBS MD DM
- Telefonnummer: 802 04023378888
- E-mail: ramchandanimohan@gmail.com
-
-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Voksen
- Ældre voksen
Tager imod sunde frivillige
Beskrivelse
Inclusion Criteria:
Patient-level
- Age ≥18 years
- Fit for endoscopic therapy and sedation
- Written informed consent
Exclusion Criteria:
Lesion-level
- Endoscopically visible gastric neuroendocrine tumor
- Size 5-9 mm (endoscopic estimation)
- Clinical and/or histologic features consistent with type I gastric NET
- No endoscopic features suggestive of deep invasion
- Technically amenable to snare resection
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Diagnostisk
- Tildeling: N/A
- Interventionel model: Enkelt gruppeopgave
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
Andet: Type I Gastric Neuro Endocrine tumour
Lesion should be less than 10mm size
|
Andre navne:
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
• To determine the histologic R0 resection rate of UEMR for type I gastric NETs measuring 5-9 mm.
Tidsramme: 3 months
|
No recurrence after 3 months of procedure
|
3 months
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Immediate and delayed adverse events
Tidsramme: 24 hours
|
To check any possible adverse events post procedure
|
24 hours
|
|
Procedure time
Tidsramme: 30 minutes
|
To calculate the exact time of procedure
|
30 minutes
|
|
Histologic quality of resection (deep and lateral margins)
Tidsramme: 5 days
|
To check the depth of invasion of the tumour
|
5 days
|
Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: Zaheer Dr Nabi, MD, AIG Hospitals
- Studiestol: Mohan Dr Ramchandani, MD, AIG Hospitals
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Anslået)
Primær færdiggørelse
Studieafslutning (Anslået)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- EMR01
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
Studerer et amerikansk FDA-reguleret lægemiddelprodukt
Studerer et amerikansk FDA-reguleret enhedsprodukt
Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .