{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Unknown+Primary+Tumors&page=3",
    "query": {
      "condition": "Unknown Primary Tumors",
      "page": 3
    },
    "page_size": 10
  },
  "pagination": {
    "page": 3,
    "page_size": 10,
    "total_count": 101,
    "total_pages": 11,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Unknown+Primary+Tumors&page=4&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Unknown+Primary+Tumors&page=2&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-03T02:53:38.166Z",
  "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": "NCT00066781",
      "title": "Gemcitabine and Irinotecan in Treating Patients With Cancer of Unknown Primary",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Carcinoma of Unknown Primary"
      ],
      "interventions": [
        {
          "name": "gemcitabine hydrochloride",
          "type": "DRUG"
        },
        {
          "name": "irinotecan hydrochloride",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Alliance for Clinical Trials in Oncology",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 31,
      "start_date": "2004-02",
      "completion_date": "2009-03",
      "has_results": true,
      "last_update_posted_date": "2017-04-04",
      "last_synced_at": "2026-10-03T02:53:38.166Z",
      "location_count": 4,
      "location_summary": "Mason City, Iowa • Rochester, Minnesota • Lincoln, Nebraska + 1 more",
      "locations": [
        {
          "city": "Mason City",
          "state": "Iowa"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "Lincoln",
          "state": "Nebraska"
        },
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00066781"
    },
    {
      "nct_id": "NCT02721732",
      "title": "Pembrolizumab in Treating Patients With Rare Tumors That Cannot Be Removed by Surgery or Are Metastatic",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Advanced Malignant Solid Neoplasm",
        "Carcinoma of Unknown Primary",
        "Metastatic Adrenal Gland Pheochromocytoma",
        "Metastatic Kidney Medullary Carcinoma",
        "Metastatic Malignant Germ Cell Tumor",
        "Metastatic Malignant Solid Neoplasm",
        "Metastatic Paraganglioma",
        "Metastatic Penile Carcinoma",
        "Metastatic Skin Squamous Cell Carcinoma",
        "Small Cell Carcinoma",
        "Stage III Adrenal Cortex Carcinoma AJCC v7",
        "Stage IV Adrenal Cortex Carcinoma AJCC v7",
        "Stage IV Penile Cancer AJCC v7",
        "Stage IV Renal Cell Cancer AJCC v7",
        "Unresectable Adrenal Gland Pheochromocytoma",
        "Unresectable Paraganglioma",
        "Unresectable Skin Squamous Cell Carcinoma",
        "Unresectable Solid Neoplasm",
        "Vascular Neoplasm"
      ],
      "interventions": [
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Pembrolizumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER",
        "BIOLOGICAL"
      ],
      "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": 157,
      "start_date": "2016-08-15",
      "completion_date": "2028-12-31",
      "has_results": true,
      "last_update_posted_date": "2026-07-17",
      "last_synced_at": "2026-10-03T02:53:38.166Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02721732"
    },
    {
      "nct_id": "NCT04456140",
      "title": "Pro-Active Genetic Testing in Patients With Solid Tumors, Inherit Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Breast Carcinoma",
        "Digestive System Neoplasm",
        "Malignant Brain Neoplasm",
        "Malignant Central Nervous System Neoplasm",
        "Malignant Female Reproductive System Neoplasm",
        "Malignant Genitourinary System Neoplasm",
        "Malignant Head and Neck Neoplasm",
        "Malignant Musculoskeletal Neoplasm",
        "Malignant Solid Neoplasm",
        "Metastatic Malignant Neoplasm of Unknown Primary",
        "Skin Carcinoma"
      ],
      "interventions": [
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Genetic Counseling",
          "type": "OTHER"
        },
        {
          "name": "Genetic Testing",
          "type": "OTHER"
        },
        {
          "name": "Survey Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "OTHER"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 230,
      "start_date": "2020-06-29",
      "completion_date": "2021-09-21",
      "has_results": false,
      "last_update_posted_date": "2023-07-24",
      "last_synced_at": "2026-10-03T02:53:38.166Z",
      "location_count": 2,
      "location_summary": "Scottsdale, Arizona • Jacksonville, Florida",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04456140"
    },
    {
      "nct_id": "NCT00745381",
      "title": "A Collection of Clinical and Epidemiologic Data Combined With Tissue and Blood From Patients With a Diagnosis of Neuroendocrine Tumors",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Gastric Cancer",
        "Pancreatic Cancer"
      ],
      "interventions": [
        {
          "name": "questionnaire, Blood specimens",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "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": 238,
      "start_date": "2008-08",
      "completion_date": "2020-07-30",
      "has_results": false,
      "last_update_posted_date": "2020-08-04",
      "last_synced_at": "2026-10-03T02:53:38.166Z",
      "location_count": 3,
      "location_summary": "Basking Ridge, New Jersey • Commack, New York • New York, New York",
      "locations": [
        {
          "city": "Basking Ridge",
          "state": "New Jersey"
        },
        {
          "city": "Commack",
          "state": "New York"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00745381"
    },
    {
      "nct_id": "NCT00148135",
      "title": "Combination of Carboplatin, Gemcitabine, and Capecitabine in Patients With Carcinoma of Unknown Primary Site",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Carcinoma of Unknown Primary"
      ],
      "interventions": [
        {
          "name": "Carboplatin",
          "type": "DRUG"
        },
        {
          "name": "Gemcitabine",
          "type": "DRUG"
        },
        {
          "name": "Capecitabine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Michigan Rogel 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": null,
      "start_date": "2001-05",
      "completion_date": "2007-10",
      "has_results": false,
      "last_update_posted_date": "2008-01-10",
      "last_synced_at": "2026-10-03T02:53:38.166Z",
      "location_count": 1,
      "location_summary": "Ann Arbor, Michigan",
      "locations": [
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00148135"
    },
    {
      "nct_id": "NCT00003526",
      "title": "Antineoplaston Therapy in Treating Patients With Cancer of Unknown Primary Origin",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Unknown Primary Carcinoma"
      ],
      "interventions": [
        {
          "name": "Antineoplaston therapy (Atengenal + Astugenal)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Burzynski Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "6 Months to 99 Years"
      },
      "enrollment_count": 8,
      "start_date": "1996-03-18",
      "completion_date": "2005-02-02",
      "has_results": true,
      "last_update_posted_date": "2020-12-17",
      "last_synced_at": "2026-10-03T02:53:38.166Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00003526"
    },
    {
      "nct_id": "NCT00360360",
      "title": "Paclitaxel/Carboplatin Plus Bevacizumab/Erlotinib in the First Line Treatment of Carcinoma of Unknown Primary Site",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Neoplasm, Unknown Primary"
      ],
      "interventions": [
        {
          "name": "paclitaxel",
          "type": "DRUG"
        },
        {
          "name": "carboplatin",
          "type": "DRUG"
        },
        {
          "name": "bevacizumab",
          "type": "DRUG"
        },
        {
          "name": "erlotinib",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "SCRI Development Innovations, LLC",
      "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": "2006-07",
      "completion_date": "2009-03",
      "has_results": true,
      "last_update_posted_date": "2013-12-04",
      "last_synced_at": "2026-10-03T02:53:38.166Z",
      "location_count": 9,
      "location_summary": "Jacksonville, Florida • Gainesville, Georgia • Evansville, Indiana + 6 more",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Gainesville",
          "state": "Georgia"
        },
        {
          "city": "Evansville",
          "state": "Indiana"
        },
        {
          "city": "Bowling Green",
          "state": "Kentucky"
        },
        {
          "city": "Baton Rouge",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00360360"
    },
    {
      "nct_id": "NCT04475640",
      "title": "Cancer Genetic Testing in Ethnic Populations",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Breast Carcinoma",
        "Carcinoma of Unknown Primary",
        "Central Nervous System Carcinoma",
        "Digestive System Carcinoma",
        "Genitourinary System Carcinoma",
        "Head and Neck Carcinoma",
        "Malignant Brain Neoplasm",
        "Malignant Female Reproductive System Neoplasm",
        "Malignant Musculoskeletal Neoplasm",
        "Malignant Solid Neoplasm",
        "Skin Carcinoma"
      ],
      "interventions": [
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Genetic Testing",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "OTHER"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1800,
      "start_date": "2020-01-13",
      "completion_date": "2028-10-15",
      "has_results": false,
      "last_update_posted_date": "2026-04-02",
      "last_synced_at": "2026-10-03T02:53:38.166Z",
      "location_count": 2,
      "location_summary": "Scottsdale, Arizona • Jacksonville, Florida",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04475640"
    },
    {
      "nct_id": "NCT03868020",
      "title": "Fluciclovine F18 PET/CT in Identifying the Origin of Head and Neck Squamous Cell Carcinoma in Patients With Metastatic Cervical Nodal Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Metastatic Head and Neck Squamous Cell Carcinoma",
        "Metastatic Squamous Cell Carcinoma in Cervical Lymph Node"
      ],
      "interventions": [
        {
          "name": "Computed Tomography",
          "type": "PROCEDURE"
        },
        {
          "name": "Fluciclovine F18",
          "type": "RADIATION"
        },
        {
          "name": "Positron Emission Tomography",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "RADIATION"
      ],
      "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": 16,
      "start_date": "2019-04-24",
      "completion_date": "2024-03-22",
      "has_results": false,
      "last_update_posted_date": "2024-03-28",
      "last_synced_at": "2026-10-03T02:53:38.166Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03868020"
    },
    {
      "nct_id": "NCT00010023",
      "title": "Capecitabine Combined With Cisplatin in Treating Patients With Locally Advanced or Metastatic Solid Tumors",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Cancer"
      ],
      "interventions": [
        {
          "name": "capecitabine",
          "type": "DRUG"
        },
        {
          "name": "cisplatin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "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": null,
      "start_date": "2000-08",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2011-04-05",
      "last_synced_at": "2026-10-03T02:53:38.166Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00010023"
    }
  ]
}