{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=ER%2B+Breast+Cancer",
    "query": {
      "condition": "ER+ Breast Cancer"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 572,
    "total_pages": 58,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=ER%2B+Breast+Cancer&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-06-25T12:37:17.095Z",
  "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": "NCT03285412",
      "title": "CDK 4/6 Inhibitor, Ribociclib, With Adjuvant Endocrine Therapy for ER-positive Breast Cancer",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Ribociclib",
          "type": "DRUG"
        },
        {
          "name": "Endocrine therapy",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Massachusetts General Hospital",
      "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": 120,
      "start_date": "2017-12-12",
      "completion_date": "2026-10",
      "has_results": false,
      "last_update_posted_date": "2025-12-22",
      "last_synced_at": "2026-06-25T12:37:17.095Z",
      "location_count": 3,
      "location_summary": "Boston, Massachusetts • Danvers, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Danvers",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03285412"
    },
    {
      "nct_id": "NCT05576077",
      "title": "A Study of TBio-4101 (TIL) and Pembrolizumab in Patients With Advanced Solid Tumors",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Breast Cancer",
        "Colorectal Cancer",
        "Uveal Melanoma",
        "Cutaneous Melanoma",
        "Non-Small Cell Lung Cancer",
        "Head and Neck Squamous Cell Carcinoma"
      ],
      "interventions": [
        {
          "name": "TBio-4101",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Pembrolizumab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DRUG"
      ],
      "sponsor": "Turnstone Biologics, Corp.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 31,
      "start_date": "2023-01-17",
      "completion_date": "2025-02-24",
      "has_results": false,
      "last_update_posted_date": "2025-03-10",
      "last_synced_at": "2026-06-25T12:37:17.095Z",
      "location_count": 11,
      "location_summary": "Irvine, California • Hollywood, Florida • Miami, Florida + 8 more",
      "locations": [
        {
          "city": "Irvine",
          "state": "California"
        },
        {
          "city": "Hollywood",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05576077"
    },
    {
      "nct_id": "NCT05104866",
      "title": "A Phase-3, Open-Label, Randomized Study of Dato-DXd Versus Investigator's Choice of Chemotherapy (ICC) in Participants With Inoperable or Metastatic HR-Positive, HER2-Negative Breast Cancer Who Have Been Treated With One or Two Prior Lines of Systemic Chemotherapy (TROPION-Breast01)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Dato-DXd",
          "type": "DRUG"
        },
        {
          "name": "Capecitabine",
          "type": "DRUG"
        },
        {
          "name": "Gemcitabine",
          "type": "DRUG"
        },
        {
          "name": "Eribulin",
          "type": "DRUG"
        },
        {
          "name": "Vinorelbine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 732,
      "start_date": "2021-10-18",
      "completion_date": "2026-07-31",
      "has_results": true,
      "last_update_posted_date": "2026-05-05",
      "last_synced_at": "2026-06-25T12:37:17.095Z",
      "location_count": 14,
      "location_summary": "Duarte, California • Los Angeles, California • Palo Alto, California + 10 more",
      "locations": [
        {
          "city": "Duarte",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05104866"
    },
    {
      "nct_id": "NCT04563507",
      "title": "Combined Immunotherapies in Metastatic ER+ Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Stereotactic Body Radiation Therapy (SBRT) (50GY in 5 fractions)",
          "type": "RADIATION"
        },
        {
          "name": "Letrozole 2.5Mg Tab",
          "type": "DRUG"
        },
        {
          "name": "Palbociclib 125mg",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "RADIATION",
        "DRUG"
      ],
      "sponsor": "Weill Medical College of Cornell University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "90 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 90 Years · Female only"
      },
      "enrollment_count": 102,
      "start_date": "2020-11-12",
      "completion_date": "2028-10-31",
      "has_results": false,
      "last_update_posted_date": "2025-12-15",
      "last_synced_at": "2026-06-25T12:37:17.095Z",
      "location_count": 3,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04563507"
    },
    {
      "nct_id": "NCT02260661",
      "title": "Phase I, Dose Study to Look at the Safety and Pharmacokinetics of AZD8835 in Patients With Advanced Solid Tumours",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Advanced Solid Malignancies",
        "Breast Cancer - ER+, HER2 -",
        "Breast Cancer - ER+, HER2-, PIK3CA Gene Mutation"
      ],
      "interventions": [
        {
          "name": "AZD8835",
          "type": "DRUG"
        },
        {
          "name": "AZD8835 in combination with fulvestrant",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "130 Years",
        "sex": "ALL",
        "summary": "18 Years to 130 Years"
      },
      "enrollment_count": 20,
      "start_date": "2014-11",
      "completion_date": "2016-07",
      "has_results": false,
      "last_update_posted_date": "2016-10-10",
      "last_synced_at": "2026-06-25T12:37:17.095Z",
      "location_count": 5,
      "location_summary": "Denver, Colorado • Greenville, South Carolina • Nashville, Tennessee + 2 more",
      "locations": [
        {
          "city": "Denver",
          "state": "Colorado"
        },
        {
          "city": "Greenville",
          "state": "South Carolina"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        },
        {
          "city": "Houston",
          "state": "Texas"
        },
        {
          "city": "Milwaukee",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02260661"
    },
    {
      "nct_id": "NCT02820961",
      "title": "Drug-Drug Interaction Study of Entinostat and Exemestane in Postmenopausal Women With ER+ Breast Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Breast Cancer",
        "Estrogen Receptor Positive Breast Cancer"
      ],
      "interventions": [
        {
          "name": "entinostat",
          "type": "DRUG"
        },
        {
          "name": "exemestane",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Syndax Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 85 Years · Female only"
      },
      "enrollment_count": 61,
      "start_date": "2016-06-29",
      "completion_date": "2021-07-12",
      "has_results": false,
      "last_update_posted_date": "2021-12-15",
      "last_synced_at": "2026-06-25T12:37:17.095Z",
      "location_count": 3,
      "location_summary": "Denver, Colorado • Sarasota, Florida • Nashville, Tennessee",
      "locations": [
        {
          "city": "Denver",
          "state": "Colorado"
        },
        {
          "city": "Sarasota",
          "state": "Florida"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02820961"
    },
    {
      "nct_id": "NCT02236572",
      "title": "Neoadj ph 2 AI Plus Everolimus in Postmenopausal Women w/ ER Pos/HER2 Neg, Low Risk Score",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Everolimus",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Yale University",
      "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": 17,
      "start_date": "2014-11-29",
      "completion_date": "2021-03-01",
      "has_results": true,
      "last_update_posted_date": "2022-02-01",
      "last_synced_at": "2026-06-25T12:37:17.095Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02236572"
    },
    {
      "nct_id": "NCT02049957",
      "title": "Safety and Efficacy Study of Sapanisertib in Combination With Exemestane or Fulvestrant in Postmenopausal Women With Estrogen Receptor Positive/Human Epidermal Growth Factor Receptor 2 Negative (ER+/HER2-) Metastatic Breast Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Sapanisertib",
          "type": "DRUG"
        },
        {
          "name": "Fulvestrant",
          "type": "DRUG"
        },
        {
          "name": "Exemestane",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Calithera Biosciences, Inc",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 118,
      "start_date": "2014-02-13",
      "completion_date": "2018-06-29",
      "has_results": true,
      "last_update_posted_date": "2023-02-08",
      "last_synced_at": "2026-06-25T12:37:17.095Z",
      "location_count": 30,
      "location_summary": "Los Angeles, California • San Francisco, California • Santa Barbara, California + 24 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Santa Barbara",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Lakewood",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02049957"
    },
    {
      "nct_id": "NCT01522820",
      "title": "Vaccine Therapy With or Without Sirolimus in Treating Patients With NY-ESO-1 Expressing Solid Tumors",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Anaplastic Astrocytoma",
        "Anaplastic Oligoastrocytoma",
        "Anaplastic Oligodendroglioma",
        "Estrogen Receptor Negative",
        "Estrogen Receptor Positive",
        "Glioblastoma",
        "Hormone-Resistant Prostate Cancer",
        "Metastatic Prostate Carcinoma",
        "Metastatic Renal Cell Cancer",
        "Recurrent Adult Brain Neoplasm",
        "Recurrent Bladder Carcinoma",
        "Recurrent Breast Carcinoma",
        "Recurrent Colorectal Carcinoma",
        "Recurrent Esophageal Carcinoma",
        "Recurrent Gastric Carcinoma",
        "Recurrent Hepatocellular Carcinoma",
        "Recurrent Lung Carcinoma",
        "Recurrent Melanoma",
        "Recurrent Ovarian Carcinoma",
        "Recurrent Prostate Carcinoma",
        "Recurrent Renal Cell Carcinoma",
        "Recurrent Uterine Corpus Carcinoma",
        "Resectable Hepatocellular Carcinoma",
        "Sarcoma",
        "Stage IA Breast Cancer",
        "Stage IA Ovarian Cancer",
        "Stage IA Uterine Corpus Cancer",
        "Stage IB Breast Cancer",
        "Stage IB Ovarian Cancer",
        "Stage IB Uterine Corpus Cancer",
        "Stage IC Ovarian Cancer",
        "Stage II Uterine Corpus Cancer",
        "Stage IIA Breast Cancer",
        "Stage IIA Lung Carcinoma",
        "Stage IIA Ovarian Cancer",
        "Stage IIB Breast Cancer",
        "Stage IIB Esophageal Cancer",
        "Stage IIB Lung Carcinoma",
        "Stage IIB Ovarian Cancer",
        "Stage IIB Skin Melanoma",
        "Stage IIC Ovarian Cancer",
        "Stage IIC Skin Melanoma",
        "Stage IIIA Breast Cancer",
        "Stage IIIA Esophageal Cancer",
        "Stage IIIA Lung Carcinoma",
        "Stage IIIA Ovarian Cancer",
        "Stage IIIA Skin Melanoma",
        "Stage IIIA Uterine Corpus Cancer",
        "Stage IIIB Breast Cancer",
        "Stage IIIB Esophageal Cancer",
        "Stage IIIB Ovarian Cancer",
        "Stage IIIB Skin Melanoma",
        "Stage IIIB Uterine Corpus Cancer",
        "Stage IIIC Breast Cancer",
        "Stage IIIC Esophageal Cancer",
        "Stage IIIC Ovarian Cancer",
        "Stage IIIC Skin Melanoma",
        "Stage IIIC Uterine Corpus Cancer",
        "Stage IV Bladder Urothelial Carcinoma",
        "Stage IV Esophageal Cancer",
        "Stage IV Ovarian Cancer",
        "Stage IV Prostate Cancer",
        "Stage IV Skin Melanoma",
        "Stage IVA Uterine Corpus Cancer",
        "Stage IVB Uterine Corpus Cancer"
      ],
      "interventions": [
        {
          "name": "DEC-205/NY-ESO-1 Fusion Protein CDX-1401",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Pharmacological Study",
          "type": "OTHER"
        },
        {
          "name": "Sirolimus",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER",
        "DRUG"
      ],
      "sponsor": "Roswell Park Cancer Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 18,
      "start_date": "2012-03",
      "completion_date": "2016-07",
      "has_results": false,
      "last_update_posted_date": "2016-10-04",
      "last_synced_at": "2026-06-25T12:37:17.095Z",
      "location_count": 1,
      "location_summary": "Buffalo, New York",
      "locations": [
        {
          "city": "Buffalo",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01522820"
    },
    {
      "nct_id": "NCT03291938",
      "title": "IACS-010759 in Advanced Cancers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Advanced Malignant Solid Neoplasm",
        "Anatomic Stage III Breast Cancer AJCC v8",
        "Anatomic Stage IIIA Breast Cancer AJCC v8",
        "Anatomic Stage IIIB Breast Cancer AJCC v8",
        "Anatomic Stage IIIC Breast Cancer AJCC v8",
        "Anatomic Stage IV Breast Cancer AJCC v8",
        "Estrogen Receptor Negative",
        "HER2/Neu Negative",
        "Metastatic Malignant Solid Neoplasm",
        "Pancreatic Ductal Adenocarcinoma",
        "Progesterone Receptor Negative",
        "Prognostic Stage III Breast Cancer AJCC v8",
        "Prognostic Stage IIIA Breast Cancer AJCC v8",
        "Prognostic Stage IIIB Breast Cancer AJCC v8",
        "Prognostic Stage IIIC Breast Cancer AJCC v8",
        "Prognostic Stage IV Breast Cancer AJCC v8",
        "Recurrent Lymphoma",
        "Refractory Lymphoma",
        "Stage II Pancreatic Cancer AJCC v8",
        "Stage IIA Pancreatic Cancer AJCC v8",
        "Stage IIB Pancreatic Cancer AJCC v8",
        "Stage III Pancreatic Cancer AJCC v8",
        "Stage IV Pancreatic Cancer AJCC v8",
        "Triple-Negative Breast Carcinoma",
        "Unresectable Solid Neoplasm"
      ],
      "interventions": [
        {
          "name": "Oxidative Phosphorylation Inhibitor IACS-010759",
          "type": "DRUG"
        },
        {
          "name": "Pharmacodynamic Study",
          "type": "OTHER"
        },
        {
          "name": "Pharmacokinetic Study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 29,
      "start_date": "2017-11-13",
      "completion_date": "2020-11-23",
      "has_results": false,
      "last_update_posted_date": "2020-11-24",
      "last_synced_at": "2026-06-25T12:37:17.095Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03291938"
    }
  ]
}