Clinical trials
Cancer of Unknown Primary Site clinical trials
Below are recruiting cancer of unknown primary site clinical trials, each written for real people, not researchers. We’re tracking 21 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07761429RecruitingPhase 2/Phase 3
Study of a new drug with chemo for cancer of unknown primary
This trial tests a new drug (F520) combined with two chemotherapy drugs for people whose cancer started in an unknown place in the body. It aims to see if the combination shrinks tumors and is safe.
Shanghai, Shanghai MunicipalityAges 18–75 - NCT06644716Recruiting
FAPI PET-CT scan to find unknown primary cancer
This study tests a new type of PET-CT scan using a tracer called FAPI to find the original source of cancer when standard tests have not been able to. It may help identify the primary tumor in people with cancer that has spread from an unknown location.
AmsterdamAges 18–99 - NCT04273061RecruitingPhase 2
Atezolizumab for tumors that look sensitive on DNA/RNA testing
This Phase 2 study tests atezolizumab, an immunotherapy drug, in people with advanced, incurable solid tumors whose tumor DNA/RNA suggests they may respond. The goal is to see if the treatment works better for patients selected by these lab results.
Vancouver, British ColumbiaAges 18 years+ - NCT04504604Recruiting
Study matching rare cancer care with tumor DNA testing
This study looks at people with rare solid tumors or lymphoma to understand their cancer’s genetic changes. It collects blood and existing tissue samples (from standard care) for DNA testing and gathers health information to help improve knowledge about rare cancers.
Cambridge, MassachusettsAges 18 years+ - NCT05576974RecruitingPhase 2
Test a dye used during surgery to find head and neck cancer
This trial tests whether a single dose of an imaging dye (given during surgery) can help doctors find the unknown origin of head and neck cancer and check safety. It may help guide surgery and biopsies when the primary cancer location hasn’t been identified.
Dallas, TexasAges 18–99 - NCT06140992Recruiting
A trial to classify cancer of unknown primary
This trial is for people whose cancer started in an unknown place (cancer of unknown primary). It uses a special test called PaCIFiC-CUP to help classify the cancer, which may guide better treatment choices.
Guangzhou, GuangdongAges 18–80 - NCT05918510Recruiting
Blood and tumor study for virus markers in throat cancer
This study looks at virus-related markers and tiny gene regulators (microRNAs) in tumor tissue from people with certain throat cancers caused by human papilloma virus (HPV). It’s observational, meaning it does not change your treatment, but results may help doctors better understand these cancers and how they behave.
RomeAges 18 years+ - NCT06638931RecruitingPhase 2
Nivolumab for rare solid tumors with high PD-L1
This trial is testing a drug called Nivolumab (an immunotherapy) for people with rare solid tumors that have high levels of PD-L1. It might be an option if you have tried other treatments and they stopped working or caused too many side effects.
Fortaleza, CearáAges 18 years+ - NCT04754321RecruitingPhase 1
Test immunotherapy with salvage surgery and IORT for head and neck cancer
This Phase 1 trial tests a new plan that combines immunotherapy with surgery, plus a targeted radiation treatment called IORT. It is for people whose head and neck squamous cell cancer has come back or never fully went away and can be operated on. The goal is to shrink or control the cancer and see how safe the approach is.
Columbus, OhioAges 18 years+ - NCT06639074RecruitingPhase 2
Folate receptor dendritic cell vaccine for ovarian cancer
This trial tests a personalized vaccine made from your own immune cells, designed to target a protein called folate receptor alpha found on many ovarian cancer cells. It is for people who have finished initial chemotherapy and have no signs of cancer remaining, to try to prevent it from coming back.
Scottsdale, ArizonaAges 18 years+ - NCT06995508RecruitingPhase 2
Olanzapine for appetite loss in head and neck cancer patients
This trial tests if the drug olanzapine can help improve appetite in people with head and neck cancer who are getting chemotherapy and radiation. It aims to prevent or reduce weight loss during treatment.
Buffalo, New YorkAges 18 years+ - NCT06636734RecruitingPhase 2
Lovastatin plus pembrolizumab for advanced head and neck cancer
This trial tests whether adding lovastatin (a cholesterol-lowering drug) to pembrolizumab (an immunotherapy) works better than pembrolizumab alone for head and neck cancer that has come back or spread. It's for people who haven't had immunotherapy before and aren't already on a statin.
Atlanta, GeorgiaAges 18 years+ - NCT05172245RecruitingPhase 1
Testing a new drug added to chemoradiation for head and neck cancer
This study tests whether adding a new targeted drug called ipatasertib to standard chemoradiation can improve treatment for people with locally advanced head and neck cancer. Ipatasertib may help block a protein that helps cancer grow, possibly making the standard therapy more effective.
Tampa, FloridaAges 18 years+ - NCT07283939Recruiting
Testing a tool to adjust chemo doses and reduce treatment delays
This trial tests a computer algorithm called PAGODA that helps doctors adjust chemotherapy doses for people with gastrointestinal cancers. The goal is to prevent unplanned treatment delays while keeping the treatment effective.
Fairbanks, AlaskaAges 18 years+ - NCT06589804RecruitingPhase 3
Testing cetuximab plus pembrolizumab for advanced head and neck cancer
This trial tests whether adding cetuximab to the standard drug pembrolizumab works better for head and neck cancer that has spread or come back after treatment. It is for people whose cancer did not respond to platinum chemotherapy and whose tumors have a certain immune marker (PD-L1).
Little Rock, ArkansasAges 18 years+ - NCT06420973RecruitingPhase 2
Testing RC48 for ovarian cancer returning after platinum treatment
This trial tests a new drug, RC48, for people with ovarian cancer that came back after responding well to platinum chemotherapy. RC48 targets the HER2 protein on cancer cells, which may stop the tumor from growing. Researchers want to see if it's safe and works better than current options.
Beijing, Beijing MunicipalityAges 18–75 - NCT05726370RecruitingPhase 2
Pembrolizumab plus chemo before surgery for recurrent head and neck cancer
This Phase 2 trial tests whether giving pembrolizumab (an immune therapy) plus chemotherapy before curative surgery can improve outcomes for people with resectable, recurrent head and neck squamous cell cancer. It also studies how these treatments affect the tumor and immune response using required tissue and blood samples.
Boston, MassachusettsAges 18 years+ - NCT07512921Recruiting
Gene Expression Study for HPV-Negative Head and Neck Cancer
This study compares gene patterns in tumor tissue and blood samples from patients with HPV-negative head and neck cancer. Understanding these patterns may help doctors better understand the disease and develop better treatments.
MilanAges 18 years+ - NCT05793151Recruiting
Guided care to start cancer treatment on time after surgery
This trial tests a navigation program (help from a care coordinator) versus usual care to help people start the recommended “next-step” treatments (like radiation, sometimes with chemo) on time after surgery. It’s for certain stages of squamous cell cancer in the head and neck area where late treatment could matter.
St Louis, MissouriAges 18 years+ - NCT03860883Recruiting
Comparing wider versus narrower surgery margins for stage II melanoma
This trial studies whether removing a slightly wider strip of skin around a melanoma improves outcomes compared with a narrower strip. It also uses a lymph node staging procedure to check spread and helps doctors fine-tune surgery for stage II melanoma.
Mobile, AlabamaAges 18 years+ - NCT06238648RecruitingPhase 2
Epcoritamab for B-cell lymphoma after CAR-T therapy
This trial tests if the drug epcoritamab can help people with B-cell lymphoma whose cancer showed only a partial response 30 days after CAR-T cell therapy. It compares epcoritamab to simply monitoring the condition.
Rochester, MinnesotaAges 18 years+
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Common questions
- Are there clinical trials for cancer of unknown primary site?
- Yes. Clin2 currently lists 21 recruiting cancer of unknown primary site studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a cancer of unknown primary site trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a cancer of unknown primary site trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.