{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Elevated+CA15-3+or+CEA+or+CA27-29",
    "query": {
      "condition": "Elevated CA15-3 or CEA or CA27-29"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 1,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-07-23T20:15:23.223Z",
  "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": "NCT03723928",
      "title": "S1703 Serum Tumor Marker Directed Disease Monitoring in Patients With Hormone Receptor Positive Her2 Negative Metastatic Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Anatomic Stage IV Breast Cancer AJCC v8",
        "Estrogen Receptor Positive",
        "HER2/Neu Negative",
        "Progesterone Receptor Positive",
        "Prognostic Stage IV Breast Cancer AJCC v8",
        "Elevated CA15-3 or CEA or CA27-29"
      ],
      "interventions": [
        {
          "name": "Usual care disease monitoring",
          "type": "OTHER"
        },
        {
          "name": "Serum Tumor Marker directed disease monitoring",
          "type": "OTHER"
        },
        {
          "name": "Quality-of-Life Assessment",
          "type": "OTHER"
        },
        {
          "name": "Anxiety Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "SWOG Cancer Research Network",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 739,
      "start_date": "2018-09-17",
      "completion_date": "2036-12-01",
      "has_results": false,
      "last_update_posted_date": "2026-04-02",
      "last_synced_at": "2026-07-23T20:15:23.223Z",
      "location_count": 709,
      "location_summary": "Anchorage, Alaska • Fairbanks, Alaska • Kingman, Arizona + 456 more",
      "locations": [
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03723928"
    }
  ]
}