Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Retroperitoneal Sarcoma: early-phase trial registry
6 of 7 indexed Retroperitoneal Sarcoma trials are currently recruiting, with more weight in Phase 1-2.
Corpus placement: #2,497 of 28,707 conditions by registered trial count.
7 US clinical trials · 6 currently recruiting · #2,497 of 28,707 conditions by registered trial count
Retroperitoneal Sarcoma: 7 US clinical trials tracked, 6 recruiting.
Retroperitoneal Sarcoma is the subject of 7 registered US clinical trials on ClinicalTrials.gov, 6 of them currently open to new participants. 1 are in Phase 3-4 (later-stage) and 5 in Phase 1-2 (earlier-stage). The most active sponsor is Fondazione IRCCS Istituto Nazionale dei Tumori, Milano, running 1 of these trials.
Enrollment posture brief
Registry condition retroperitoneal-sarcoma
OPEN 6 | RECR 86% | LATE 1 | EARLY 5 | RANK #2497 | SPON 1
Volume-matched condition peers
Nearest open-share peer: Adenovirus (86% recruiting · 7 trials)
Retroperitoneal Sarcoma lists 6 open slots (86% of 7 indexed trials). Peers are matched on registered volume, not therapeutic-area browse lists. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Retroperitoneal Sarcoma on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Retroperitoneal Sarcoma is recruiting above its size-band peers.
6 of 7 indexed trials (85.7%) are open to enrollment, against a 46.5% average across 27,806 conditions with fewer than 20 trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
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Sponsorship of Retroperitoneal Sarcoma trials is spread across many organizations.
Fondazione IRCCS Istituto Nazionale dei Tumori, Milano accounts for 1 of 7 trials (14.3%). 7 distinct sponsors appear on at least one study for this condition label.
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Typical Retroperitoneal Sarcoma enrolment sits around 80 participants.
Median target enrolment is 80 among the 7 trials that report a genuine target (sentinel values excluded). 4 of those (57.1%) plan for fewer than 100 participants.
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Retroperitoneal Sarcoma research is mostly interventional.
6 interventional and 1 observational studies make up this index (85.7% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
7 total, page 1 of 1
REtroperitoneal SArcoma Registry: an International Prospective Initiative
Fondazione IRCCS Istituto Nazionale dei Tumori, Milano
NCT03838718
Surgery With or Without Neoadjuvant Chemotherapy in High Risk RetroPeritoneal Sarcoma
European Organisation for Research and Treatment of Cancer - EORTC
NCT04031677
Proton or Photon RT for Retroperitoneal Sarcomas
Massachusetts General Hospital
NCT01659203
Proton-Spatially Fractionated Radiotherapy and Standard Radiation Therapy for the Treatment of Newly Diagnosed Retroperitoneal Soft Tissue Sarcoma
Northwestern University
NCT06327477
Evaluation of Abemaciclib and Radiation Therapy Before Surgery for the Treatment of High-Risk Adipocytic Retroperitoneal Sarcoma
University of Washington
NCT06025747
Short Course Radiation Treatment for Patients With Primary or Locally Recurrent Retroperitoneal Sarcoma Prior to Surgery
Brigham and Women's Hospital
NCT06812052
Repeat or Single Quadratus Lumborum Block for the Reduction of Opioid Prescriptions After Surgery in Retroperitoneal Sarcoma Patients ("RESQU-SARC" Trial)
M.D. Anderson Cancer Center
NCT04189783
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 4 |
| Phase 2 | 1 |
| Phase 3 | 1 |
Top Sponsors
Named interventions
Most-linked intervention names on Retroperitoneal Sarcoma records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Retroperitoneal Sarcoma trials. A trial with sites in several states counts in each.
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Related
What to do with this Retroperitoneal Sarcoma page
7 registered trials, 6 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 6 Retroperitoneal Sarcoma trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- Fondazione IRCCS Istituto Nazionale dei Tumori, Milano sponsors the most Retroperitoneal Sarcoma trials on record, review their full trial history before evaluating a specific study. See Fondazione IRCCS Istituto Nazionale dei Tumori, Milano's trials
- Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide
Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Retroperitoneal Sarcoma condition card totals 7 registered trials; most-linked intervention Radiation Therapy; top US site state Massachusetts. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.