{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Osteosarcoma%2C+Recurrent%2C+Refractory&page=2",
    "query": {
      "condition": "Osteosarcoma, Recurrent, Refractory",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Osteosarcoma%2C+Recurrent%2C+Refractory&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-05-21T23:25:35.694Z",
  "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": "NCT03526250",
      "title": "Palbociclib in Treating Patients With Relapsed or Refractory Rb Positive Advanced Solid Tumors, Non-Hodgkin Lymphoma, or Histiocytic Disorders With Activating Alterations in Cell Cycle Genes (A Pediatric MATCH Treatment Trial)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Advanced Malignant Solid Neoplasm",
        "Recurrent Childhood Ependymoma",
        "Recurrent Ewing Sarcoma",
        "Recurrent Glioma",
        "Recurrent Hepatoblastoma",
        "Recurrent Kidney Wilms Tumor",
        "Recurrent Langerhans Cell Histiocytosis",
        "Recurrent Malignant Germ Cell Tumor",
        "Recurrent Malignant Glioma",
        "Recurrent Medulloblastoma",
        "Recurrent Neuroblastoma",
        "Recurrent Non-Hodgkin Lymphoma",
        "Recurrent Osteosarcoma",
        "Recurrent Peripheral Primitive Neuroectodermal Tumor",
        "Recurrent Rhabdoid Tumor",
        "Recurrent Rhabdomyosarcoma",
        "Recurrent Soft Tissue Sarcoma",
        "Refractory Ependymoma",
        "Refractory Ewing Sarcoma",
        "Refractory Glioma",
        "Refractory Hepatoblastoma",
        "Refractory Langerhans Cell Histiocytosis",
        "Refractory Malignant Germ Cell Tumor",
        "Refractory Malignant Glioma",
        "Refractory Medulloblastoma",
        "Refractory Neuroblastoma",
        "Refractory Non-Hodgkin Lymphoma",
        "Refractory Osteosarcoma",
        "Refractory Peripheral Primitive Neuroectodermal Tumor",
        "Refractory Rhabdoid Tumor",
        "Refractory Rhabdomyosarcoma",
        "Refractory Soft Tissue Sarcoma"
      ],
      "interventions": [
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Palbociclib",
          "type": "DRUG"
        },
        {
          "name": "Pharmacological Study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DRUG"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Months",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "12 Months to 21 Years"
      },
      "enrollment_count": 23,
      "start_date": "2018-08-13",
      "completion_date": "2024-09-30",
      "has_results": true,
      "last_update_posted_date": "2026-04-03",
      "last_synced_at": "2026-05-21T23:25:35.694Z",
      "location_count": 115,
      "location_summary": "Birmingham, Alabama • Anchorage, Alaska • Mesa, Arizona + 93 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03526250"
    },
    {
      "nct_id": "NCT00012181",
      "title": "Flavopiridol in Treating Children With Relapsed or Refractory Solid Tumors or Lymphomas",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Recurrent Childhood Brain Stem Glioma",
        "Recurrent Childhood Cerebellar Astrocytoma",
        "Recurrent Childhood Cerebral Astrocytoma",
        "Recurrent Childhood Ependymoma",
        "Recurrent Childhood Large Cell Lymphoma",
        "Recurrent Childhood Liver Cancer",
        "Recurrent Childhood Lymphoblastic Lymphoma",
        "Recurrent Childhood Malignant Germ Cell Tumor",
        "Recurrent Childhood Medulloblastoma",
        "Recurrent Childhood Rhabdomyosarcoma",
        "Recurrent Childhood Small Noncleaved Cell Lymphoma",
        "Recurrent Childhood Soft Tissue Sarcoma",
        "Recurrent Childhood Supratentorial Primitive Neuroectodermal Tumor",
        "Recurrent Childhood Visual Pathway and Hypothalamic Glioma",
        "Recurrent Childhood Visual Pathway Glioma",
        "Recurrent Ewing Sarcoma/Peripheral Primitive Neuroectodermal Tumor",
        "Recurrent Neuroblastoma",
        "Recurrent Osteosarcoma",
        "Recurrent Retinoblastoma",
        "Recurrent Wilms Tumor and Other Childhood Kidney Tumors",
        "Recurrent/Refractory Childhood Hodgkin Lymphoma",
        "Unspecified Childhood Solid Tumor, Protocol Specific"
      ],
      "interventions": [
        {
          "name": "alvocidib",
          "type": "DRUG"
        },
        {
          "name": "pharmacological study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "Up to 21 Years"
      },
      "enrollment_count": 30,
      "start_date": "2001-04",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2013-07-02",
      "last_synced_at": "2026-05-21T23:25:35.694Z",
      "location_count": 1,
      "location_summary": "Arcadia, California",
      "locations": [
        {
          "city": "Arcadia",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00012181"
    },
    {
      "nct_id": "NCT03458728",
      "title": "Safety, Tolerability, Efficacy and Pharmacokinetics of Copanlisib in Pediatric Patients",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Relapsed or Refractory Solid Tumors or Lymphoma in Children",
        "Neuroblastoma",
        "Osteosarcoma",
        "Rhabdomyosarcoma",
        "Ewing Sarcoma"
      ],
      "interventions": [
        {
          "name": "Copanlisib (BAY806946)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bayer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "6 Months to 21 Years"
      },
      "enrollment_count": 31,
      "start_date": "2018-04-30",
      "completion_date": "2023-02-01",
      "has_results": true,
      "last_update_posted_date": "2023-12-04",
      "last_synced_at": "2026-05-21T23:25:35.694Z",
      "location_count": 14,
      "location_summary": "Birmingham, Alabama • Orange, California • Aurora, Colorado + 11 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03458728"
    },
    {
      "nct_id": "NCT03213704",
      "title": "Larotrectinib in Treating Patients With Relapsed or Refractory Advanced Solid Tumors, Non-Hodgkin Lymphoma, or Histiocytic Disorders With NTRK Fusions (A Pediatric MATCH Treatment Trial)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Advanced Malignant Solid Neoplasm",
        "Recurrent Ependymoma",
        "Recurrent Ewing Sarcoma/Peripheral Primitive Neuroectodermal Tumor",
        "Recurrent Glioma",
        "Recurrent Hepatoblastoma",
        "Recurrent Kidney Wilms Tumor",
        "Recurrent Langerhans Cell Histiocytosis",
        "Recurrent Malignant Germ Cell Tumor",
        "Recurrent Malignant Glioma",
        "Recurrent Malignant Solid Neoplasm",
        "Recurrent Medulloblastoma",
        "Recurrent Neuroblastoma",
        "Recurrent Non-Hodgkin Lymphoma",
        "Recurrent Osteosarcoma",
        "Recurrent Rhabdoid Tumor",
        "Recurrent Rhabdomyosarcoma",
        "Recurrent Soft Tissue Sarcoma",
        "Refractory Ependymoma",
        "Refractory Ewing Sarcoma/Peripheral Primitive Neuroectodermal Tumor",
        "Refractory Glioma",
        "Refractory Hepatoblastoma",
        "Refractory Langerhans Cell Histiocytosis",
        "Refractory Malignant Germ Cell Tumor",
        "Refractory Malignant Glioma",
        "Refractory Malignant Solid Neoplasm",
        "Refractory Medulloblastoma",
        "Refractory Neuroblastoma",
        "Refractory Non-Hodgkin Lymphoma",
        "Refractory Osteosarcoma",
        "Refractory Primary Central Nervous System Neoplasm",
        "Refractory Rhabdoid Tumor",
        "Refractory Rhabdomyosarcoma",
        "Refractory Soft Tissue Sarcoma"
      ],
      "interventions": [
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Bone Marrow Aspiration and Biopsy",
          "type": "PROCEDURE"
        },
        {
          "name": "Bone Scan",
          "type": "PROCEDURE"
        },
        {
          "name": "Computed Tomography",
          "type": "PROCEDURE"
        },
        {
          "name": "Larotrectinib Sulfate",
          "type": "DRUG"
        },
        {
          "name": "Magnetic Resonance Imaging",
          "type": "PROCEDURE"
        },
        {
          "name": "Radionuclide Imaging",
          "type": "PROCEDURE"
        },
        {
          "name": "X-Ray Imaging",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DRUG"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Months",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "12 Months to 21 Years"
      },
      "enrollment_count": 9,
      "start_date": "2017-08-23",
      "completion_date": "2026-10-08",
      "has_results": true,
      "last_update_posted_date": "2026-04-23",
      "last_synced_at": "2026-05-21T23:25:35.694Z",
      "location_count": 122,
      "location_summary": "Birmingham, Alabama • Anchorage, Alaska • Mesa, Arizona + 95 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03213704"
    },
    {
      "nct_id": "NCT04791228",
      "title": "A Pilot Study of Thermodox and MR-HIFU for Treatment of Relapsed Solid Tumors",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Solid Tumors",
        "Soft Tissue Sarcoma",
        "Ewing Sarcoma",
        "Malignant Epithelial Neoplasm",
        "Rhabdomyosarcoma",
        "Wilms Tumor",
        "Hepatic Tumor",
        "Germ Cell Tumor",
        "Bone Metastases"
      ],
      "interventions": [
        {
          "name": "Magnetic Resonance-Guided High Intensity Focused Ultrasound",
          "type": "DEVICE"
        },
        {
          "name": "Lyso-thermosensitive Liposomal Doxorubicin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "DRUG"
      ],
      "sponsor": "Children's National Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "12 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2022-11-10",
      "completion_date": "2024-12-23",
      "has_results": false,
      "last_update_posted_date": "2025-01-01",
      "last_synced_at": "2026-05-21T23:25:35.694Z",
      "location_count": 1,
      "location_summary": "Washington D.C., District of Columbia",
      "locations": [
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04791228"
    },
    {
      "nct_id": "NCT04803877",
      "title": "SARC038: Phase 2 Study of Regorafenib and Nivolumab in Osteosarcoma",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Osteosarcoma",
        "Osteosarcoma in Children",
        "Osteosarcoma Recurrent",
        "Osteosarcoma Metastatic"
      ],
      "interventions": [
        {
          "name": "Regorafenib 40 MG",
          "type": "DRUG"
        },
        {
          "name": "Regorafenib 20MG",
          "type": "DRUG"
        },
        {
          "name": "Nivolumab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Sarcoma Alliance for Research through Collaboration",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "5 Years and older"
      },
      "enrollment_count": 48,
      "start_date": "2021-06-04",
      "completion_date": "2026-06",
      "has_results": false,
      "last_update_posted_date": "2025-10-31",
      "last_synced_at": "2026-05-21T23:25:35.694Z",
      "location_count": 8,
      "location_summary": "Los Angeles, California • Miami, Florida • Baltimore, Maryland + 5 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        },
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04803877"
    },
    {
      "nct_id": "NCT01154816",
      "title": "Alisertib in Treating Young Patients With Recurrent or Refractory Solid Tumors or Leukemia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hepatoblastoma",
        "Previously Treated Childhood Rhabdomyosarcoma",
        "Recurrent Childhood Acute Lymphoblastic Leukemia",
        "Recurrent Childhood Acute Myeloid Leukemia",
        "Recurrent Childhood Kidney Neoplasm",
        "Recurrent Childhood Malignant Germ Cell Tumor",
        "Recurrent Childhood Rhabdomyosarcoma",
        "Recurrent Childhood Soft Tissue Sarcoma",
        "Recurrent Ewing Sarcoma/Peripheral Primitive Neuroectodermal Tumor",
        "Recurrent Neuroblastoma",
        "Recurrent Osteosarcoma"
      ],
      "interventions": [
        {
          "name": "Alisertib",
          "type": "DRUG"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Pharmacological Study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Children's Oncology Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "1 Year to 21 Years"
      },
      "enrollment_count": 118,
      "start_date": "2011-02",
      "completion_date": "2019-06-30",
      "has_results": true,
      "last_update_posted_date": "2020-05-13",
      "last_synced_at": "2026-05-21T23:25:35.694Z",
      "location_count": 97,
      "location_summary": "Birmingham, Alabama • Little Rock, Arkansas • Downey, California + 78 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Downey",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01154816"
    },
    {
      "nct_id": "NCT00161187",
      "title": "Irradiated Donor Lymphocyte Infusion in Treating Patients With Relapsed or Refractory Hematologic Cancer or Solid Tumor",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Cancer"
      ],
      "interventions": [
        {
          "name": "therapeutic allogeneic lymphocytes",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "University of Medicine and Dentistry of New Jersey",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 37,
      "start_date": "2001-05",
      "completion_date": "2011-10",
      "has_results": false,
      "last_update_posted_date": "2015-11-06",
      "last_synced_at": "2026-05-21T23:25:35.694Z",
      "location_count": 1,
      "location_summary": "New Brunswick, New Jersey",
      "locations": [
        {
          "city": "New Brunswick",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00161187"
    },
    {
      "nct_id": "NCT01614795",
      "title": "Cixutumumab and Temsirolimus in Treating Younger Patients With Recurrent or Refractory Sarcoma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Childhood Alveolar Soft Part Sarcoma",
        "Childhood Angiosarcoma",
        "Childhood Epithelioid Sarcoma",
        "Childhood Fibrosarcoma",
        "Childhood Gliosarcoma",
        "Childhood Leiomyosarcoma",
        "Childhood Liposarcoma",
        "Childhood Malignant Peripheral Nerve Sheath Tumor",
        "Childhood Synovial Sarcoma",
        "Previously Treated Childhood Rhabdomyosarcoma",
        "Recurrent Childhood Rhabdomyosarcoma",
        "Recurrent Childhood Soft Tissue Sarcoma",
        "Recurrent Ewing Sarcoma/Peripheral Primitive Neuroectodermal Tumor",
        "Recurrent Osteosarcoma",
        "Rhabdomyosarcoma"
      ],
      "interventions": [
        {
          "name": "Cixutumumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Temsirolimus",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER",
        "DRUG"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "30 Years",
        "sex": "ALL",
        "summary": "1 Year to 30 Years"
      },
      "enrollment_count": 46,
      "start_date": "2012-06-18",
      "completion_date": "2014-04-01",
      "has_results": true,
      "last_update_posted_date": "2018-12-11",
      "last_synced_at": "2026-05-21T23:25:35.694Z",
      "location_count": 74,
      "location_summary": "Birmingham, Alabama • Little Rock, Arkansas • Loma Linda, California + 62 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Loma Linda",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01614795"
    },
    {
      "nct_id": "NCT03811886",
      "title": "Natalizumab in Recurrent, Refractory or Progressive Pulmonary Metastatic Osteosarcoma",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Pulmonary Metastatic Osteosarcoma (pOS)"
      ],
      "interventions": [
        {
          "name": "Natalizumab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Case Comprehensive Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "30 Years",
        "sex": "ALL",
        "summary": "5 Years to 30 Years"
      },
      "enrollment_count": 0,
      "start_date": "2024-12-01",
      "completion_date": "2026-10-01",
      "has_results": false,
      "last_update_posted_date": "2025-01-15",
      "last_synced_at": "2026-05-21T23:25:35.694Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03811886"
    }
  ]
}