{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Circulating+Tumor+DNA+%28ctDNA%29+Assay",
    "query": {
      "intervention": "Circulating Tumor DNA (ctDNA) Assay"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 25,
    "total_pages": 3,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Circulating+Tumor+DNA+%28ctDNA%29+Assay&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-28T22:19:08.254Z",
  "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": "NCT06666439",
      "title": "Longitudinal Tumor Burden Quantification Using Circulating Tumor DNA in Metastatic Lobular Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Metastatic Invasive Lobular Carcinoma (mILC)"
      ],
      "interventions": [
        {
          "name": "circulating tumor DNA (ctDNA)",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Julia Foldi",
      "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": "2024-12-12",
      "completion_date": "2029-10-31",
      "has_results": false,
      "last_update_posted_date": "2026-01-20",
      "last_synced_at": "2026-09-28T22:19:08.254Z",
      "location_count": 1,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06666439"
    },
    {
      "nct_id": "NCT02620527",
      "title": "Concordance Between ctDNA Assay and FoundationOne",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Circulating Tumor DNA",
        "Cancer",
        "Neoplasms",
        "Genomic Testing",
        "Genomic Alterations"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Foundation Medicine",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1400,
      "start_date": "2014-11",
      "completion_date": "2017-12",
      "has_results": false,
      "last_update_posted_date": "2018-08-01",
      "last_synced_at": "2026-09-28T22:19:08.254Z",
      "location_count": 1,
      "location_summary": "Cambridge, Massachusetts",
      "locations": [
        {
          "city": "Cambridge",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02620527"
    },
    {
      "nct_id": "NCT07214532",
      "title": "Signatera-Guided CDK4/6 Inhibitor Therapy in Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Breast Neoplasms",
        "Carcinoma, Ductal, Breast",
        "Receptors, Estrogen (for ER-positive Requirement)"
      ],
      "interventions": [
        {
          "name": "ctDNA-Guided Treatment Strategy",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Natera, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 725,
      "start_date": "2026-05-08",
      "completion_date": "2037-12-30",
      "has_results": false,
      "last_update_posted_date": "2026-09-23",
      "last_synced_at": "2026-09-28T22:19:08.254Z",
      "location_count": 49,
      "location_summary": "Phoenix, Arizona • Scottsdale, Arizona • Tucson, Arizona + 44 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Greenbrae",
          "state": "California"
        },
        {
          "city": "Loma Linda",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07214532"
    },
    {
      "nct_id": "NCT06716580",
      "title": "EQUAL: EGFR ctDNA QUantative Assessment for Lung Cancer Screening in Asian and Latinx Populations",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Lung Cancer",
        "EGFR Gene Mutation"
      ],
      "interventions": [
        {
          "name": "Circulating Tumor DNA (ctDNA) Assay",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Dana-Farber Cancer Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "40 Years to 80 Years"
      },
      "enrollment_count": 1000,
      "start_date": "2025-04-01",
      "completion_date": "2030-09-01",
      "has_results": false,
      "last_update_posted_date": "2026-07-15",
      "last_synced_at": "2026-09-28T22:19:08.254Z",
      "location_count": 6,
      "location_summary": "Boston, Massachusetts • Brighton, Massachusetts • Methuen, Massachusetts + 1 more",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Brighton",
          "state": "Massachusetts"
        },
        {
          "city": "Methuen",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06716580"
    },
    {
      "nct_id": "NCT06736613",
      "title": "A Study of Circulating Tumor DNA (ctDNA) Testing for People With B-Cell Lymphoma",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Diffuse Large B Cell Lymphoma",
        "High-grade B-cell Lymphoma",
        "Stage III High Grade B-Cell Lymphoma",
        "Stage IV High Grade B-Cell Lymphoma",
        "DLBCL - Diffuse Large B Cell Lymphoma",
        "Intravascular Large B-Cell Lymphoma",
        "Diffuse Large B Cell Lymphoma of Breast",
        "Diffuse Large B Cell Lymphoma of Testis",
        "HIV-associated Diffuse Large B Cell Lymphoma",
        "Double Expressor DLBCL"
      ],
      "interventions": [
        {
          "name": "Cerebral Spinal Fluid ctDNA",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Memorial Sloan Kettering 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": 50,
      "start_date": "2024-12-11",
      "completion_date": "2027-12-11",
      "has_results": false,
      "last_update_posted_date": "2025-12-18",
      "last_synced_at": "2026-09-28T22:19:08.254Z",
      "location_count": 7,
      "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/NCT06736613"
    },
    {
      "nct_id": "NCT05307939",
      "title": "A Study on Using Cell-Free Tumor DNA (ctDNA) Testing to Decide When to StartRoutine Treatment in People With Human Papilloma Virus (HPV)- Associated Oropharynx Cancer (OPC)",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "HPV",
        "Oropharynx Cancer",
        "HPV-Related Carcinoma",
        "HPV-Related Malignancy",
        "HPV Positive Oropharyngeal Squamous Cell Carcinoma"
      ],
      "interventions": [
        {
          "name": "HPV ctDNA Assay",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "MRI Studies",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "EORTC QLQ H&N 35 and C30",
          "type": "BEHAVIORAL"
        },
        {
          "name": "MDADI-HN",
          "type": "BEHAVIORAL"
        },
        {
          "name": "COST-FACIT",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Intensity-Modulated Radiation Therapy (Arm A)",
          "type": "RADIATION"
        },
        {
          "name": "Chemoradiation (Arm B)",
          "type": "COMBINATION_PRODUCT"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST",
        "BEHAVIORAL",
        "RADIATION",
        "COMBINATION_PRODUCT"
      ],
      "sponsor": "Memorial Sloan Kettering 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": 30,
      "start_date": "2022-03-24",
      "completion_date": "2027-03-24",
      "has_results": false,
      "last_update_posted_date": "2026-04-13",
      "last_synced_at": "2026-09-28T22:19:08.254Z",
      "location_count": 8,
      "location_summary": "Miami, Florida • Basking Ridge, New Jersey • Middletown, New Jersey + 5 more",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Basking Ridge",
          "state": "New Jersey"
        },
        {
          "city": "Middletown",
          "state": "New Jersey"
        },
        {
          "city": "Montvale",
          "state": "New Jersey"
        },
        {
          "city": "Commack",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05307939"
    },
    {
      "nct_id": "NCT03786107",
      "title": "HER-Seq: A Blood-based Screening Study to Identify Patients With HER2 Mutations for Enrollment Into Clinical Research Studies of Neratinib",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hormone Receptor-Positive, HER2-Negative Metastatic Breast Cancer",
        "Metastatic Cervical Cancer"
      ],
      "interventions": [
        {
          "name": "Almac HER-Seq Assay",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Puma Biotechnology, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1583,
      "start_date": "2019-03-14",
      "completion_date": "2021-01-21",
      "has_results": false,
      "last_update_posted_date": "2021-05-19",
      "last_synced_at": "2026-09-28T22:19:08.254Z",
      "location_count": 1,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03786107"
    },
    {
      "nct_id": "NCT03774758",
      "title": "Biomarkers for Risk Stratification in Lung Cancer",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Nodule Solitary Pulmonary",
        "Non-small Cell Lung Cancer"
      ],
      "interventions": [
        {
          "name": "Guardant Health ct-DNA LUNAR assay",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 590,
      "start_date": "2017-12-17",
      "completion_date": "2030-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-06-04",
      "last_synced_at": "2026-09-28T22:19:08.254Z",
      "location_count": 3,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03774758"
    },
    {
      "nct_id": "NCT07698535",
      "title": "Measuring Circulating Tumor Deoxyribonucleic Acid Tumor Fraction to Guide Early 177Lu-PSMA-617 Treatment Discontinuation in Patients With Metastatic Castration-Resistant Prostate Cancer, DYNAMO Trial",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Metastatic Castration-Resistant Prostate Adenocarcinoma",
        "Stage IVB Prostate Cancer AJCC v8"
      ],
      "interventions": [
        {
          "name": "Lutetium Lu 177 Vipivotide Tetraxetan",
          "type": "DRUG"
        },
        {
          "name": "Cell-free Circulating Tumor DNA Assay",
          "type": "PROCEDURE"
        },
        {
          "name": "Computed Tomography",
          "type": "PROCEDURE"
        },
        {
          "name": "Docetaxel",
          "type": "DRUG"
        },
        {
          "name": "PSMA PET Scan",
          "type": "PROCEDURE"
        },
        {
          "name": "Single Photon Tomography and Computed Tomography Scan",
          "type": "PROCEDURE"
        },
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE"
      ],
      "sponsor": "University of Washington",
      "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": 64,
      "start_date": "2026-10-01",
      "completion_date": "2029-07-05",
      "has_results": false,
      "last_update_posted_date": "2026-08-27",
      "last_synced_at": "2026-09-28T22:19:08.254Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07698535"
    },
    {
      "nct_id": "NCT06401421",
      "title": "EXActDNA-003 / NSABP B-64: Study of Molecular Residual Disease Detection in Breast Cancer (MRD)",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "ctDNA MRD test",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Exact Sciences Corporation",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1800,
      "start_date": "2024-06-07",
      "completion_date": "2030-04",
      "has_results": false,
      "last_update_posted_date": "2026-01-20",
      "last_synced_at": "2026-09-28T22:19:08.254Z",
      "location_count": 53,
      "location_summary": "Anchorage, Alaska • Palo Alto, California • Torrance, California + 45 more",
      "locations": [
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "Torrance",
          "state": "California"
        },
        {
          "city": "Vallejo",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06401421"
    }
  ]
}