Clinical trial · Observational
Sentinel Lymph Node Detection in Gastric Cancer Using a Dual Tracer (Superparamagnetic Iron Oxide and Methylene Blue): A Prospective Study With Histological and OSNA Validation
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
Gastric cancer (GC) remains an oncological challenge, where lymph node involvement is a key prognostic factor. Sentinel lymph node (SLN) mapping may improve staging and reduce surgical morbidity. This study evaluated a dual-tracer technique - superparamagnetic iron oxide (SPIO) and methylene blue - for ex vivo SLN detection in GC, analysed the performance of one-step nucleic acid amplification (OSNA) versus conventional histology and applied pooling analysis with OSNA in non-sentinel nodes. The aim of this prospective study was, firstly, to evaluate the accuracy of ex vivo SLN detection using a novel dual tracer: SPIO not previously used for this pathology, combined with methylene blue. Secondly, to perform a diagnostic concordance analysis between the results of the conventional histological haematoxylin-eosin (H-E) study versus the OSNA (One Step Nucleic Acid Amplification) molecular method, for the detection of lymph node metastases in patients with gastric cancer undergoing surgery with curative intent and lymphadenectomy.
Conditions
Conditions (2)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Gastric Cancer (GC) | Malignant Gastric Neoplasm | CURATED_BROADER | 0.80 |
| Sentinel Lymph Node Biopsy (SLNB) | — | UNRESOLVED | — |
Interventions
Interventions (2)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| Dual tracer: The infiltration of the Supermagnetic Iron Oxide (SPIO) and Methylene Blue | Procedure | — | UNRESOLVED |
| OSNA AND H-E | Diagnostic Test | — | UNRESOLVED |
Design
Arms and outcomes
Arms (1)
- label
- PATIENTS WITH GASTRIC CANCER AND CK19+
- interventionNames
- Procedure: Dual tracer: The infiltration of the Supermagnetic Iron Oxide (SPIO) and Methylene Blue
- Diagnostic Test: OSNA AND H-E
Primary outcomes (1)
- measure
- demographic, clinical and pathological variables
- timeFrame
- cut-off date for all patients: 15 July 2025.
- description
- For each patient included in the study, demographic, clinical and pathological variables were systematically collected: age, sex, type of neoplasm, size, tumour grade, TNM 8ed, stage, neoadjuvant treatment and degree of regression, if any. Perioperative variables such as type of intervention, type of lymphadenectomy, time of infiltration and tracer detection, operative complications, reoperation rate and hospital stay were also evaluated. During follow-up, oncological variables such as recurrence rate, mortality, overall survival and disease-free survival were analysed
Secondary outcomes (2)
- measure
- Migration times of both tracers
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 18 Years
Show eligibility criteria text
Inclusion Criteria: * Patients over 18 years of age with a diagnosis of gastric adenocarcinoma, undergoing surgery with curative intent by total or subtotal gastrectomy, accompanied by D1, D1+ or D2 lymphadenectomy, and with preoperative positivity for cytokeratin 19 (CK19) in the tumour sample. Exclusion Criteria: * Patients with gastric cancer recurrence, those diagnosed with other active neoplasms, metastatic disease at diagnosis, as well as patients with Siewert type I and II gastrooesophageal junction carcinoma. Neoadjuvant treatment was not considered an exclusion criterion.
References
Publications (0)
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