{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Hypofractionated+external+beam+radiation",
    "query": {
      "intervention": "Hypofractionated external beam radiation"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 33,
    "total_pages": 4,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Hypofractionated+external+beam+radiation&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-24T12:19:45.825Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT01266642",
      "title": "Hypofractionated Radiation Therapy or Standard Radiation Therapy in Treating Patients With Ductal Breast Carcinoma In Situ or Early Invasive Breast Cancer",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Ductal Breast Carcinoma In Situ",
        "Invasive Breast Carcinoma",
        "Stage I Breast Cancer AJCC v6",
        "Stage IA Breast Cancer AJCC v7",
        "Stage IB Breast Cancer AJCC v7",
        "Stage II Breast Cancer AJCC v6 and v7",
        "Stage IIA Breast Cancer AJCC v6 and v7",
        "Stage IIB Breast Cancer AJCC v6 and v7"
      ],
      "interventions": [
        {
          "name": "External Beam Radiation Therapy",
          "type": "RADIATION"
        },
        {
          "name": "Hypofractionated Radiation Therapy",
          "type": "RADIATION"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Quality-of-Life Assessment",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        },
        {
          "name": "Whole Breast Irradiation",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION",
        "OTHER"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "40 Years and older · Female only"
      },
      "enrollment_count": 301,
      "start_date": "2011-02-08",
      "completion_date": "2040-11-30",
      "has_results": true,
      "last_update_posted_date": "2026-08-17",
      "last_synced_at": "2026-09-24T12:19:45.825Z",
      "location_count": 7,
      "location_summary": "Gilbert, Arizona • Orlando, Florida • Conroe, Texas + 3 more",
      "locations": [
        {
          "city": "Gilbert",
          "state": "Arizona"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Conroe",
          "state": "Texas"
        },
        {
          "city": "Houston",
          "state": "Texas"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01266642"
    },
    {
      "nct_id": "NCT03910439",
      "title": "Avelumab in Combination With Hypofractionated Radiotherapy in Patients With Relapsed Refractory Multiple Myeloma",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Myeloma, Multiple",
        "Myeloma-Multiple"
      ],
      "interventions": [
        {
          "name": "Avelumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "External beam radiotherapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "RADIATION"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 4,
      "start_date": "2019-10-17",
      "completion_date": "2020-11-04",
      "has_results": true,
      "last_update_posted_date": "2021-05-12",
      "last_synced_at": "2026-09-24T12:19:45.825Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03910439"
    },
    {
      "nct_id": "NCT03402607",
      "title": "Trial Comparing PLA to HIGRT (PROVE-HCC)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hepatocellular Carcinoma"
      ],
      "interventions": [
        {
          "name": "Percutaneous Local Ablation",
          "type": "PROCEDURE"
        },
        {
          "name": "Hypofractionated Image Guided Radiation Therapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "RADIATION"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 12,
      "start_date": "2018-08-08",
      "completion_date": "2020-03-25",
      "has_results": true,
      "last_update_posted_date": "2022-07-08",
      "last_synced_at": "2026-09-24T12:19:45.825Z",
      "location_count": 2,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03402607"
    },
    {
      "nct_id": "NCT02621151",
      "title": "Pembrolizumab (MK3475), Gemcitabine, and Concurrent Hypofractionated Radiation Therapy for Muscle-Invasive Urothelial Cancer of the Bladder",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Muscle-invasive Urothelial Cancer of the Bladder"
      ],
      "interventions": [
        {
          "name": "Pembrolizumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Transurethral Resection of Bladder Tumor",
          "type": "PROCEDURE"
        },
        {
          "name": "Gemcitabine",
          "type": "DRUG"
        },
        {
          "name": "External Beam Radiation Therapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "PROCEDURE",
        "DRUG",
        "RADIATION"
      ],
      "sponsor": "NYU Langone Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2016-08-11",
      "completion_date": "2025-12",
      "has_results": true,
      "last_update_posted_date": "2025-10-07",
      "last_synced_at": "2026-09-24T12:19:45.825Z",
      "location_count": 5,
      "location_summary": "Chicago, Illinois • Ann Arbor, Michigan • New York, New York + 1 more",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Chapel Hill",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02621151"
    },
    {
      "nct_id": "NCT06559540",
      "title": "Ultra-Hypofractionated vs. Hypofractionated Radiation for Node-Positive Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Node-positive Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Hypofractionated radiation",
          "type": "RADIATION"
        },
        {
          "name": "Ultra-hypofractionated breast/chest wall and regional nodal radiation",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 220,
      "start_date": "2024-08-27",
      "completion_date": "2034-04-30",
      "has_results": false,
      "last_update_posted_date": "2026-01-09",
      "last_synced_at": "2026-09-24T12:19:45.825Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06559540"
    },
    {
      "nct_id": "NCT02659540",
      "title": "Pilot Study of the Safety/Efficacy of Combination Checkpoint Blockade + External Beam Radiotherapy in Stage IV Melanoma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Melanoma"
      ],
      "interventions": [
        {
          "name": "Nivolumab",
          "type": "DRUG"
        },
        {
          "name": "Ipilimumab",
          "type": "DRUG"
        },
        {
          "name": "Radiotherapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "DRUG",
        "RADIATION"
      ],
      "sponsor": "Ludwig Institute for Cancer Research",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 20,
      "start_date": "2016-10-13",
      "completion_date": "2020-07-27",
      "has_results": true,
      "last_update_posted_date": "2022-10-28",
      "last_synced_at": "2026-09-24T12:19:45.825Z",
      "location_count": 2,
      "location_summary": "Stanford, California • New York, New York",
      "locations": [
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02659540"
    },
    {
      "nct_id": "NCT06538337",
      "title": "Hypofractionated External Beam Radiotherapy With Adaptive Planning for Endometrial and Cervical Cancers",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Endometrial Cancer",
        "Cervical Cancer"
      ],
      "interventions": [
        {
          "name": "External beam Radiotherapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "Jonsson Comprehensive Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 60,
      "start_date": "2024-07-24",
      "completion_date": "2032-07-26",
      "has_results": false,
      "last_update_posted_date": "2026-08-20",
      "last_synced_at": "2026-09-24T12:19:45.825Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06538337"
    },
    {
      "nct_id": "NCT04262154",
      "title": "Study of Abiraterone Acetate or Enzalutamide, Atezolizumab, GnRH Analog and Radiation Therapy in Men With Newly Diagnosed Hormone-sensitive Prostate Cancer",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Metastatic Prostate Cancer"
      ],
      "interventions": [
        {
          "name": "Atezolizumab",
          "type": "DRUG"
        },
        {
          "name": "Abiraterone",
          "type": "DRUG"
        },
        {
          "name": "Prednisone",
          "type": "DRUG"
        },
        {
          "name": "GnRH analog",
          "type": "DRUG"
        },
        {
          "name": "Stereotactic Body Radiotherapy (SBRT)",
          "type": "RADIATION"
        },
        {
          "name": "Enzalutamide",
          "type": "DRUG"
        },
        {
          "name": "Follow up",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "RADIATION",
        "OTHER"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 28,
      "start_date": "2020-03-03",
      "completion_date": "2026-09",
      "has_results": true,
      "last_update_posted_date": "2026-05-11",
      "last_synced_at": "2026-09-24T12:19:45.825Z",
      "location_count": 8,
      "location_summary": "Basking Ridge, New Jersey • Middletown, New Jersey • Montvale, New Jersey + 4 more",
      "locations": [
        {
          "city": "Basking Ridge",
          "state": "New Jersey"
        },
        {
          "city": "Middletown",
          "state": "New Jersey"
        },
        {
          "city": "Montvale",
          "state": "New Jersey"
        },
        {
          "city": "Commack",
          "state": "New York"
        },
        {
          "city": "Harrison",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04262154"
    },
    {
      "nct_id": "NCT03452332",
      "title": "Stereotactic Body Radiation Therapy, Tremelimumab and Durvalumab in Treating Participants With Recurrent or Metastatic Cervical, Vaginal, or Vulvar Cancers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Advanced Cervical Adenocarcinoma",
        "Advanced Vaginal Carcinoma",
        "Advanced Vulvar Carcinoma",
        "Human Papillomavirus-Related Cervical Squamous Cell Carcinoma",
        "Human Papillomavirus-Related Vulvar Squamous Cell Carcinoma",
        "Metastatic Cervical Adenocarcinoma",
        "Metastatic Cervical Carcinoma",
        "Metastatic Cervical Squamous Cell Carcinoma, Not Otherwise Specified",
        "Metastatic Vaginal Adenocarcinoma",
        "Metastatic Vaginal Carcinoma",
        "Metastatic Vulvar Carcinoma",
        "Recurrent Cervical Adenocarcinoma",
        "Recurrent Cervical Carcinoma",
        "Recurrent Cervical Squamous Cell Carcinoma, Not Otherwise Specified",
        "Recurrent Vaginal Carcinoma",
        "Recurrent Vulvar Carcinoma",
        "Stage III Cervical Cancer AJCC v8",
        "Stage III Vaginal Cancer AJCC v8",
        "Stage III Vulvar Cancer AJCC v8",
        "Stage IIIA Cervical Cancer AJCC v8",
        "Stage IIIA Vulvar Cancer AJCC v8",
        "Stage IIIB Cervical Cancer AJCC v8",
        "Stage IIIB Vulvar Cancer AJCC v8",
        "Stage IIIC Vulvar Cancer AJCC v8",
        "Stage IV Cervical Cancer AJCC v8",
        "Stage IV Vaginal Cancer AJCC v8",
        "Stage IV Vulvar Cancer AJCC v8",
        "Stage IVA Cervical Cancer AJCC v8",
        "Stage IVA Vaginal Cancer AJCC v8",
        "Stage IVA Vulvar Cancer AJCC v8",
        "Stage IVB Cervical Cancer AJCC v8",
        "Stage IVB Vaginal Cancer AJCC v8",
        "Stage IVB Vulvar Cancer AJCC v8",
        "Vaginal Squamous Cell Carcinoma, Not Otherwise Specified",
        "Vulvar Adenocarcinoma",
        "Vulvar Squamous Cell Carcinoma"
      ],
      "interventions": [
        {
          "name": "Durvalumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Stereotactic Radiosurgery",
          "type": "RADIATION"
        },
        {
          "name": "Tremelimumab",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER",
        "RADIATION"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 20,
      "start_date": "2018-07-18",
      "completion_date": "2023-08-11",
      "has_results": false,
      "last_update_posted_date": "2023-09-13",
      "last_synced_at": "2026-09-24T12:19:45.825Z",
      "location_count": 2,
      "location_summary": "Dallas, Texas • Houston, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03452332"
    },
    {
      "nct_id": "NCT05603910",
      "title": "Phase 1 Clinical Trial of Lenvatinib, Pembrolizumab and Hypofractionated Pelvic Radiation Therapy for pMMR Recurrent/Unresectable Endometrial Carcinoma",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Recurrent Endometrial Carcinoma",
        "Unresectable Endometrial Carcinoma"
      ],
      "interventions": [
        {
          "name": "Lenvatinib",
          "type": "DRUG"
        },
        {
          "name": "Pembrolizumab",
          "type": "DRUG"
        },
        {
          "name": "Hypofractionated External Beam Radiation Therapy",
          "type": "RADIATION"
        },
        {
          "name": "High-Dose Rate (HDR) Brachytherapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "DRUG",
        "RADIATION"
      ],
      "sponsor": "Aaron Wolfson",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 18,
      "start_date": "2023-04-15",
      "completion_date": "2034-04-15",
      "has_results": false,
      "last_update_posted_date": "2026-08-03",
      "last_synced_at": "2026-09-24T12:19:45.825Z",
      "location_count": 1,
      "location_summary": "Miami, Florida",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05603910"
    }
  ]
}