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Phase II Trial Comparing Stereotactic Body Radiotherapy Versus Active Surveillance for Oligometastatic Adenoid Cystic Carcinoma

22 septembre 2026 mis à jour par: Aman Sharma, All India Institute of Medical Sciences

SABR Oligo-ACC Trial: A Randomized Phase II Trial Comparing Stereotactic Body Radiotherapy Versus Active Surveillance for Oligometastatic Adenoid Cystic Carcinoma

The SABR Oligo-ACC Trial is a randomized phase II study comparing early initiation of SBRT to all metastases versus active surveillance in patients with oligometastatic ACC.

By directly comparing these strategies, the study will determine whether treating limited metastatic disease at the earliest opportunity translates into improved progression-free survival, while also evaluating overall survival, local control, subsequent patterns of progression, time to systemic therapy, toxicity and quality of life.

Aperçu de l'étude

Statut

Pas encore de recrutement

Les conditions

Intervention / Traitement

Description détaillée

The oligometastatic state represents a potentially distinct phase of cancer dissemination in which eradication of all visible metastatic disease may alter subsequent disease progression. Prospective randomized trials in several solid tumors have provided evidence supporting this paradigm. In the phase II SABR-COMET trial, patients with a controlled primary tumor and 1-5 metastases randomized to comprehensive SABR had longer overall survival than those receiving standard treatment alone (median 41 vs 28 months; HR 0.57). Long-term follow-up demonstrated a 5-year overall survival of 42.3% with SABR versus 17.7% with standard treatment. There is robust prospective evidence that metastasis-directed therapy can modify the course of oligometastatic disease; however, their findings cannot be directly extrapolated to adenoid cystic carcinoma (ACC), which has distinct tumor biology and natural history.

A recent retrospective study has demonstrated that patients with oligometastatic ACC had more favorable outcomes than patients with higher metastatic burden, and that early initiation of local treatment was associated with improvement in PFS. However, these observations are subject to selection and other inherent biases of retrospective studies and cannot establish that local ablative therapy itself improves survival or progression-free survival.

The SABR Oligo-ACC Trial is therefore proposed as a randomized, phase II study comparing early initiation of SBRT to all metastases versus active surveillance in patients with oligometastatic ACC.

90 patients with histologically confirmed ACC of any primary site along with oligometastatic disease (1-5 active radiologically detectable extracranial metastatic lesions involving one or more organs) will be participating in this study.

They will be randomized (computer-generated randomization system) in a 1:1 ratio to either Stereotactic Body Radiotherapy (SBRT) or Active Surveillance.

Arm A=SBRT to all oligometastasis Arm B =Active surveillance Overall survival (OS), Progression Free Survival (PFS), Local Control of metatstatic lesion, SBRT toxicity (CTCAE version 5.0) and Quality of life (EORTC QLQ C-30) will be assessed at different timelines.

Type d'étude

Interventionnel

Inscription (Estimé)

90

Phase

  • Phase 2

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

18 ans et plus (Adulte, Adulte plus âgé)

Accepte les volontaires sains

Non

Sexes éligibles pour l'étude

Tout

La description

Inclusion Criteria:

  1. Age ≥18 years.
  2. Histologically confirmed adenoid cystic carcinoma (ACC) of any primary site.
  3. Oligometastatic disease, defined as 1-5 active radiologically detectable extracranial metastatic lesions involving one or more organs.
  4. Both synchronous/metachronous/ oligoprogressive oligometastatic disease are eligible.
  5. All active metastatic lesions must be amenable to comprehensive SBRT.
  6. Controlled primary tumor or loco-regional disease amenable to sugery and radiotherapy
  7. ECOG Performance Status 0-2.
  8. Adequate organ function to undergo SBRT and protocol-specified investigations.
  9. Ability and willingness to comply with study assessments and follow-up.
  10. Written informed consent.

Exclusion Criteria:

  1. >5 active metastatic lesions at the time of randomization.
  2. Any active metastatic lesion that is not safely amenable to SBRT according to protocol-defined dose and normal-tissue constraints.
  3. Uncontrolled or progressive primary/regional disease requiring immediate local treatment, except for newly diagnosed synchronous disease that has been appropriately managed and is suitable for protocol randomization.
  4. Symptomatic metastatic disease requiring immediate systemic therapy, surgery or palliative radiotherapy.
  5. Metastatic disease associated with an oncological emergency, including impending pathological fracture, spinal cord compression, unstable spinal disease, major airway compromise, major vascular compromise or other condition requiring urgent intervention.
  6. Active untreated CNS metastases requiring surgery, SRS or other CNS-directed treatment.
  7. Oligoinduced disease during active systemic therapy.
  8. Concurrent systemic anticancer therapy at randomization or during protocol-defined SBRT.
  9. Previous radiotherapy that precludes safe delivery of protocol-specified SBRT because of cumulative dose constraints.
  10. Another active malignancy requiring treatment or likely to interfere with assessment of ACC-related outcomes.
  11. Uncontrolled intercurrent illness or medical condition that would preclude protocol treatment or follow-up.
  12. Pregnancy or lactation.
  13. Inability or unwillingness to provide informed consent or comply with study procedures.

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

  • Objectif principal: Traitement
  • Répartition: Randomisé
  • Modèle interventionnel: Affectation parallèle
  • Masquage: Aucun (étiquette ouverte)

Armes et Interventions

Groupe de participants / Bras
Intervention / Traitement
Expérimental: SBRT ARM

Comprehensive SBRT to all active metastatic lesions that are safely amenable to stereotactic treatment.

SBRT will be delivered using image-guided, highly conformal radiotherapy with appropriate immobilization and image guidance, using institutionally validated dose-fractionation schedules based on the site, size, number, and proximity of lesions to critical organs. Treatment will be planned to achieve ablative tumor doses while respecting established organ-at-risk constraints. SBRT will preferably be completed within 1-2 weeks.

Aucune intervention: Active surveillance

Observation with scheduled clinical and radiological assessment, with initiation of local or systemic treatment if clinically indicated.

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Progression-free survival (PFS)
Délai: 5 years

The length of time during and after the treatment of a disease, that a patient lives with the disease but it does not get worse.

5 years

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Contrôle local
Délai: 5 années
5 années
Overall survival (OS)
Délai: assessed at follow up visits 1 to 10 years

The length of time from the start of treatment for the disease, that patients diagnosed with the disease are still alive.

assessed at follow up visits 1 to 10 years
Radiation Toxicity
Délai: 5 years

using CTCAE version 5.0. : Grade 1 Mild; asymptomatic or mild symptoms; clinical or diagnostic observations only; intervention not indicated. Grade 2 Moderate; minimal, local or noninvasive intervention indicated; limiting age appropriate instrumental Activities of Daily Living. Grade 3 Severe or medically significant but not immediately life-threatening; hospitalization or prolongation of hospitalization indicated; disabling; limiting self care Activities of Daily Living . Grade 4 Life-threatening consequences; urgent intervention indicated. Grade 5 Death related to AE.

5 years

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Parrainer

Publications et liens utiles

La personne responsable de la saisie des informations sur l'étude fournit volontairement ces publications. Il peut s'agir de tout ce qui concerne l'étude.

Publications générales

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Estimé)

20 décembre 2026

Achèvement primaire (Estimé)

20 décembre 2032

Achèvement de l'étude (Estimé)

20 décembre 2032

Dates d'inscription aux études

Première soumission

22 septembre 2026

Première soumission répondant aux critères de contrôle qualité

22 septembre 2026

Première publication (Réel)

28 septembre 2026

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

28 septembre 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

22 septembre 2026

Dernière vérification

1 septembre 2026

Plus d'information

Termes liés à cette étude

Autres numéros d'identification d'étude

  • AIIMS SABR Oligo-ACC Trial

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Non

Étudie un produit d'appareil réglementé par la FDA américaine

Non

Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .