International Prospective Registry on Local Treatment Approaches in MLS
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ClinicalTrials.gov Identifier: NCT04699292 |
Recruitment Status :
Recruiting
First Posted : January 7, 2021
Last Update Posted : August 30, 2022
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Condition or disease | Intervention/treatment |
---|---|
Myxoid Liposarcoma | Procedure: Surgery Radiation: Preoperative RT 36Gy Radiation: Preoperative RT 50Gy Radiation: Postoperative RT 50-66Gy Radiation: RT 36Gy |
Study Type : | Observational [Patient Registry] |
Estimated Enrollment : | 300 participants |
Observational Model: | Cohort |
Time Perspective: | Prospective |
Target Follow-Up Duration: | 5 Years |
Official Title: | International Prospective Registry on Local Treatment Approaches in Myxoid Liposarcomas |
Actual Study Start Date : | January 18, 2021 |
Estimated Primary Completion Date : | January 2031 |
Estimated Study Completion Date : | January 2031 |

Group/Cohort | Intervention/treatment |
---|---|
Cohort A
MLS patients managed by surgery only
|
Procedure: Surgery
Surgery |
Cohort B
MLS patients receiving preoperative RT to a dose of 36 Gy (equivalent) followed by surgery
|
Procedure: Surgery
Surgery Radiation: Preoperative RT 36Gy Preoperative radiotherapy to 36Gy (equivalent) |
Cohort C
MLS patients receiving preoperative RT to a dose of 50 Gy (equivalent) followed by surgery
|
Procedure: Surgery
Surgery Radiation: Preoperative RT 50Gy Preoperative radiotherapy to 50Gy (equivalent) |
Cohort D
MLS patients receiving surgery followed by postoperative RT to a dose of 50-66 Gy (equivalent)
|
Procedure: Surgery
Surgery Radiation: Postoperative RT 50-66Gy Postoperative radiotherapy to 50-66Gy (equivalent) |
Cohort E
MLS patients with oligometastatic and/or oligoprogressive disease receiving definitive RT to a dose of 36Gy (equivalent)
|
Radiation: RT 36Gy
Definitive radiotherapy to 36Gy (equivalent) |
- Local recurrence free survival [ Time Frame: From surgery to the end of at least 5 years of follow-up ]Survival from surgery to local recurrence (event) or last follow-up
- Wound complications [ Time Frame: From surgery to 6 months of follow-up ]Any wound complication requiring intervention
- Late toxicity [ Time Frame: From 3 months after surgery to the end of at least 5 years of follow-up ]Any grade ≥2 late (radiation-induced) toxicity according to CTCAE v5.0 toxicity criteria
- Patient-Reported Outcome Measures (PROMs) [ Time Frame: From baseline visit to the end of 5 years of follow-up ]PRO-CTCAE Item Library; relevant questions from the Patient-Reported Outcomes version of the CTCAE (PRO-CTCAE)
- Health-Related Quality of Life (HRQoL) [ Time Frame: From baseline visit to the end of 5 years of follow-up ]EORTC QLQ-C30; 30-item HRQoL questionnaire; EORTC Items Library; 3 questions to assess some radiotherapy-specific HRQoL; EQ5D-5L; descriptive system for measurement of health; iMCQ; relevant items from the Medical Consumption Questionnaire (iMCQ) to assess medical consumption; PRODISQ; PROductivity and DISease Questionnaire to assess all relevant aspects of the relationship between health and productivity;

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Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Sampling Method: | Non-Probability Sample |
Inclusion Criteria:
- Age > 18 years
- Biopsy proven MLS, including the reciprocal chromosomal translocation t(12;16)(q13;p11)
- ECOG PS 0-2
- Written informed consent to share coded information in this international Registry
Exclusion Criteria:
- Prior radiotherapy to the target area
- Pregnancy

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04699292
Contact: Rick Haas, MD/PhD | +31 20 512 9111 | r.haas@nki.nl | |
Contact: Jules Lansu, MD/PhD | +31 20 512 9111 | j.lansu@nki.nl |
Netherlands | |
The Netherlands Cancer Institute | Recruiting |
Amsterdam, Netherlands, 1066CX | |
Contact: Rick Haas, MD/PhD | |
Contact: Jules Lansu, MD/PhD |
Principal Investigator: | Rick Haas, MD/PhD | The Netherlands Cancer Institute |
Responsible Party: | The Netherlands Cancer Institute |
ClinicalTrials.gov Identifier: | NCT04699292 |
Other Study ID Numbers: |
M20DMY IRBd20-354 ( Other Identifier: The Netherlands Cancer Institute ) |
First Posted: | January 7, 2021 Key Record Dates |
Last Update Posted: | August 30, 2022 |
Last Verified: | August 2022 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
Liposarcoma Liposarcoma, Myxoid Neoplasms, Adipose Tissue Neoplasms, Connective and Soft Tissue |
Neoplasms by Histologic Type Neoplasms Sarcoma |