{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Retroperitoneal+Liposarcoma",
    "query": {
      "condition": "Retroperitoneal Liposarcoma"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 8,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-05-22T00:04:54.307Z",
  "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": "NCT00091351",
      "title": "Surgery With or Without Radiation Therapy in Treating Patients With Primary Soft Tissue Sarcoma of the Retroperitoneum or Pelvis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Sarcoma"
      ],
      "interventions": [
        {
          "name": "conventional surgery",
          "type": "PROCEDURE"
        },
        {
          "name": "radiation therapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "RADIATION"
      ],
      "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": 370,
      "start_date": "2004-08",
      "completion_date": "2006-02",
      "has_results": false,
      "last_update_posted_date": "2016-07-06",
      "last_synced_at": "2026-05-22T00:04:54.307Z",
      "location_count": 55,
      "location_summary": "Little Rock, Arkansas • Duarte, California • Aurora, Colorado + 42 more",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Duarte",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00091351"
    },
    {
      "nct_id": "NCT06436846",
      "title": "Genomic Risk in Retroperitoneal Sarcoma",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Retroperitoneal Liposarcoma",
        "Soft Tissue Sarcoma"
      ],
      "interventions": [
        {
          "name": "Biospecimen sample collection during standard-of-care surgery",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Fox Chase Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 50,
      "start_date": "2022-03-07",
      "completion_date": "2027-08-01",
      "has_results": false,
      "last_update_posted_date": "2024-05-31",
      "last_synced_at": "2026-05-22T00:04:54.307Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06436846"
    },
    {
      "nct_id": "NCT04420975",
      "title": "Nivolumab and BO-112 Before Surgery for the Treatment of Resectable Soft Tissue Sarcoma",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Leiomyosarcoma",
        "Malignant Peripheral Nerve Sheath Tumor",
        "Myxofibrosarcoma",
        "Pleomorphic Rhabdomyosarcoma",
        "Resectable Dedifferentiated Liposarcoma",
        "Resectable Soft Tissue Sarcoma",
        "Resectable Undifferentiated Pleomorphic Sarcoma",
        "Soft Tissue Fibrosarcoma",
        "Spindle Cell Sarcoma",
        "Stage I Retroperitoneal Sarcoma AJCC (American Joint Committee on Cancer) v8",
        "Stage I Soft Tissue Sarcoma of the Trunk and Extremities AJCC v8",
        "Stage IA Retroperitoneal Sarcoma AJCC v8",
        "Stage IA Soft Tissue Sarcoma of the Trunk and Extremities AJCC v8",
        "Stage IB Retroperitoneal Sarcoma AJCC v8",
        "Stage IB Soft Tissue Sarcoma of the Trunk and Extremities AJCC v8",
        "Stage II Retroperitoneal Sarcoma AJCC v8",
        "Stage II Soft Tissue Sarcoma of the Trunk and Extremities AJCC v8",
        "Stage III Retroperitoneal Sarcoma AJCC v8",
        "Stage III Soft Tissue Sarcoma of the Trunk and Extremities AJCC v8",
        "Stage IIIA Retroperitoneal Sarcoma AJCC v8",
        "Stage IIIA Soft Tissue Sarcoma of the Trunk and Extremities AJCC v8",
        "Stage IIIB Retroperitoneal Sarcoma AJCC v8",
        "Stage IIIB Soft Tissue Sarcoma of the Trunk and Extremities AJCC v8",
        "Storiform-Pleomorphic Malignant Fibrous Histiocytoma",
        "Synovial Sarcoma",
        "Undifferentiated High Grade Pleomorphic Sarcoma of Bone",
        "Undifferentiated Pleomorphic Sarcoma",
        "Undifferentiated Pleomorphic Sarcoma With Osteoclast-Like Giant Cells",
        "Undifferentiated Pleomorphic Sarcoma, Inflammatory Variant",
        "Undifferentiated Spindle Cell Sarcoma"
      ],
      "interventions": [
        {
          "name": "Definitive Surgical Resection",
          "type": "PROCEDURE"
        },
        {
          "name": "Nanoplexed Poly I:C BO-112",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Nivolumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Radiation Therapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "BIOLOGICAL",
        "RADIATION"
      ],
      "sponsor": "Jonsson Comprehensive 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": 14,
      "start_date": "2020-10-14",
      "completion_date": "2028-01-31",
      "has_results": false,
      "last_update_posted_date": "2026-03-10",
      "last_synced_at": "2026-05-22T00:04:54.307Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04420975"
    },
    {
      "nct_id": "NCT07377747",
      "title": "Prospective Study Evaluating the Treatment Outcomes for Localised Recurrent, Resectable Retroperitoneal Liposarcoma",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Retroperitoneal Liposarcoma"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Australia and New Zealand Sarcoma Association",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 100,
      "start_date": "2024-09-05",
      "completion_date": "2032-12",
      "has_results": false,
      "last_update_posted_date": "2026-01-30",
      "last_synced_at": "2026-05-22T00:04:54.307Z",
      "location_count": 3,
      "location_summary": "Atlanta, Georgia • Columbus, Ohio • Houston, Texas",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Columbus",
          "state": "Ohio"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07377747"
    },
    {
      "nct_id": "NCT04031677",
      "title": "Surgery With or Without Neoadjuvant Chemotherapy in High Risk RetroPeritoneal Sarcoma",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Retroperitoneal Sarcoma",
        "Liposarcoma",
        "Leiomyosarcoma"
      ],
      "interventions": [
        {
          "name": "Surgery",
          "type": "PROCEDURE"
        },
        {
          "name": "Preoperative chemotherapy",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DRUG"
      ],
      "sponsor": "European Organisation for Research and Treatment of Cancer - EORTC",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 250,
      "start_date": "2021-01-20",
      "completion_date": "2028-04-21",
      "has_results": false,
      "last_update_posted_date": "2026-03-31",
      "last_synced_at": "2026-05-22T00:04:54.307Z",
      "location_count": 106,
      "location_summary": "Birmingham, Alabama • Phoenix, Arizona • Duarte, California + 83 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Duarte",
          "state": "California"
        },
        {
          "city": "Irvine",
          "state": "California"
        },
        {
          "city": "La Jolla",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04031677"
    },
    {
      "nct_id": "NCT00004123",
      "title": "Radiation Therapy Plus Doxorubicin in Treating Patients With Resectable Primary or Recurrent Retroperitoneal Soft Tissue Sarcoma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Sarcoma"
      ],
      "interventions": [
        {
          "name": "Doxorubicin hydrochloride (DOX)",
          "type": "DRUG"
        },
        {
          "name": "Conventional surgery",
          "type": "PROCEDURE"
        },
        {
          "name": "Intraoperative radiation therapy (IORT)",
          "type": "RADIATION"
        },
        {
          "name": "Radiation Therapy (RT)",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "DRUG",
        "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": 36,
      "start_date": "1997-07",
      "completion_date": "2009-10",
      "has_results": false,
      "last_update_posted_date": "2012-07-30",
      "last_synced_at": "2026-05-22T00:04:54.307Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00004123"
    },
    {
      "nct_id": "NCT01344018",
      "title": "Surgery With or Without Radiation Therapy in Untreated Nonmetastatic Retroperitoneal Sarcoma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Sarcoma"
      ],
      "interventions": [
        {
          "name": "therapeutic conventional surgery",
          "type": "PROCEDURE"
        },
        {
          "name": "3-dimensional conformal radiation therapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "RADIATION"
      ],
      "sponsor": "European Organisation for Research and Treatment of Cancer - EORTC",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "120 Years",
        "sex": "ALL",
        "summary": "18 Years to 120 Years"
      },
      "enrollment_count": 266,
      "start_date": "2012-01",
      "completion_date": "2019-03",
      "has_results": true,
      "last_update_posted_date": "2023-04-24",
      "last_synced_at": "2026-05-22T00:04:54.307Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01344018"
    },
    {
      "nct_id": "NCT03361436",
      "title": "Eribulin and Radiation Therapy in Treating Patients With Retroperitoneal Liposarcoma That Can Be Removed by Surgery",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Liposarcoma",
        "Malignant Abdominal Neoplasm",
        "Malignant Retroperitoneal Neoplasm",
        "Malignant Scrotal Neoplasm",
        "Malignant Solid Neoplasm",
        "Malignant Spermatic Cord Neoplasm"
      ],
      "interventions": [
        {
          "name": "Eribulin Mesylate",
          "type": "DRUG"
        },
        {
          "name": "Intensity-Modulated Radiation Therapy",
          "type": "RADIATION"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Quality-of-Life Assessment",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        },
        {
          "name": "Therapeutic Conventional Surgery",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "RADIATION",
        "OTHER",
        "PROCEDURE"
      ],
      "sponsor": "OHSU Knight Cancer Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "12 Years and older"
      },
      "enrollment_count": 15,
      "start_date": "2018-03-19",
      "completion_date": "2033-04-14",
      "has_results": false,
      "last_update_posted_date": "2026-04-08",
      "last_synced_at": "2026-05-22T00:04:54.307Z",
      "location_count": 1,
      "location_summary": "Portland, Oregon",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03361436"
    }
  ]
}