The CHONQUER study
Welcome!
This website provides information about a current study for patients with locally advanced and metastatic conventional chondrosarcoma.

Why are we doing this study?
The CHONQUER study is a clinical research study exploring a potential new treatment for adults with locally advanced or metastatic conventional chondrosarcoma. Chondrosarcoma is a rare cancer that usually starts in the bones. It is the most common form of bone sarcoma in adults. While surgery is currently the most common treatment option, many patients experience a return of their disease after surgery, and these tumors tend to resist chemotherapy.
Chondrosarcoma is a serious condition and has no approved medications. New treatment options are urgently needed. In this study, researchers aim to find out if the study drug, an investigational treatment, may be safe and effective in managing this rare bone sarcoma.
By participating, you will help researchers learn more about this rare bone cancer and provide hope for better care for others living with chondrosarcoma in the future.
To learn more about the treatments being studied in the CHONQUER study, visit our About CHONQUER page.
Who can take part in this study?
We are looking for participants who:
- Are 18 years old or older
- Have been diagnosed with locally advanced or metastatic conventional chondrosarcoma
- Have a specific genetic mutation (IDH1) which will be confirmed by a testing in the frame of the study
Please note: There are additional requirements to participate. If you are interested in taking part in this study, please contact your primary care doctor, oncologist or the designated Principal Investigator for the study identified e.g. via the site finder.
What else should I know?
Participation in a clinical study is voluntary and making the decision to enroll is very important.
Without clinical trials, many of the medical treatments and cures would not exist. The goal of a clinical trial is to determine if interventions are safe and effective. Clinical trials look at new ways to prevent, detect, or treat the disease.
There is no guarantee of medical benefit. Your condition may improve, stay the same, or worsen. The study drug may cause side effects, but your health will be closely monitored throughout the study. You can leave the study at any time without it affecting your usual healthcare.
If you are diagnosed with conventional chondrosarcoma and you think you might be interested in taking part, or would like more information, please contact your primary care doctor, oncologist or the designated Principal Investigator for the study – they are happy to answer any questions you have.
Find a clinical site near you.

If you have any questions about clinical studies in general or this study, we also encourage you to discuss the CHONQUER study with your primary care doctor or oncologist.