{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Malignant+Retroperitoneal+Neoplasm",
    "query": {
      "condition": "Malignant Retroperitoneal Neoplasm"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 6,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-05-22T03:06:26.812Z",
  "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": "2026-05-22T03:06:26.812Z",
      "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": "NCT06084780",
      "title": "Intestinal & Multivisceral Transplantation for Unresectable Mucinous Carcinoma Peritonei (TRANSCAPE)",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Secondary Malignant Neoplasm of Retroperitoneum",
        "Secondary Malignant Neoplasm of Peritoneum",
        "Pseudomyxoma Peritonei"
      ],
      "interventions": [
        {
          "name": "Intestinal, Multivisceral or Modified Multivisceral Transplantation",
          "type": "PROCEDURE"
        },
        {
          "name": "Alemtuzumab",
          "type": "DRUG"
        },
        {
          "name": "Tacrolimus",
          "type": "DRUG"
        },
        {
          "name": "Sirolimus",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DRUG"
      ],
      "sponsor": "Case Comprehensive Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 20,
      "start_date": "2026-08",
      "completion_date": "2026-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-04-09",
      "last_synced_at": "2026-05-22T03:06:26.812Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06084780"
    },
    {
      "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": "2026-05-22T03:06:26.812Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04420975"
    },
    {
      "nct_id": "NCT03508570",
      "title": "Nivolumab With or Without Ipilimumab in Treating Patients With Recurrent or High Grade Gynecologic Cancer With Metastatic Peritoneal Carcinomatosis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Malignant Peritoneal Neoplasm",
        "Malignant Retroperitoneal Neoplasm",
        "Metastatic Cervical Carcinoma",
        "Metastatic Endometrial Carcinoma",
        "Metastatic Fallopian Tube Carcinoma",
        "Metastatic Malignant Female Reproductive System Neoplasm",
        "Metastatic Ovarian Carcinoma",
        "Metastatic Primary Peritoneal Carcinoma",
        "Peritoneal Carcinomatosis",
        "Platinum-Refractory Fallopian Tube Carcinoma",
        "Platinum-Refractory Malignant Female Reproductive System Neoplasm",
        "Platinum-Refractory Ovarian Carcinoma",
        "Platinum-Refractory Primary Peritoneal Carcinoma",
        "Platinum-Resistant Fallopian Tube Carcinoma",
        "Platinum-Resistant Malignant Female Reproductive System Neoplasm",
        "Platinum-Resistant Ovarian Carcinoma",
        "Platinum-Resistant Primary Peritoneal Carcinoma",
        "Recurrent Cervical Carcinoma",
        "Recurrent Endometrial Carcinoma",
        "Recurrent Fallopian Tube Carcinoma",
        "Recurrent Malignant Female Reproductive System Neoplasm",
        "Recurrent Ovarian Carcinoma",
        "Recurrent Primary Peritoneal Carcinoma",
        "Stage IV Fallopian Tube Cancer AJCC v8",
        "Stage IV Ovarian Cancer AJCC v8",
        "Stage IV Primary Peritoneal Cancer AJCC v8",
        "Stage IVA Fallopian Tube Cancer AJCC v8",
        "Stage IVA Ovarian Cancer AJCC v8",
        "Stage IVA Primary Peritoneal Cancer AJCC v8",
        "Stage IVB Cervical Cancer AJCC v8",
        "Stage IVB Fallopian Tube Cancer AJCC v8",
        "Stage IVB Ovarian Cancer AJCC v8",
        "Stage IVB Primary Peritoneal Cancer AJCC v8",
        "Stage IVB Uterine Corpus Cancer AJCC v8"
      ],
      "interventions": [
        {
          "name": "Ipilimumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Nivolumab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Pharmacokinetic Study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "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": 26,
      "start_date": "2018-09-21",
      "completion_date": "2024-11-11",
      "has_results": false,
      "last_update_posted_date": "2025-05-22",
      "last_synced_at": "2026-05-22T03:06:26.812Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03508570"
    },
    {
      "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": "2026-05-22T03:06:26.812Z",
      "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": "2026-05-22T03:06:26.812Z",
      "location_count": 1,
      "location_summary": "Portland, Oregon",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03361436"
    }
  ]
}