Clinical trials
Cancer of Unknown Primary clinical trials
Below are recruiting cancer of unknown primary clinical trials, each written for real people, not researchers. We’re tracking 42 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- 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+ - NCT07061080RecruitingPhase 2
Tarlatamab for advanced digestive neuroendocrine cancer
This trial tests a new drug called Tarlatamab for people with advanced neuroendocrine carcinoma (a rare and aggressive cancer) of the digestive system that has stopped responding to prior chemotherapy. The drug targets a protein called DLL3 found on some tumors, and researchers hope it can shrink or slow tumor growth.
Brest, BrestAges 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+ - NCT06662058Recruiting
Remote hearing test for head and neck cancer patients on cisplatin or radiation
This study tests a remote hearing test to monitor hearing changes in patients with head and neck cancer getting cisplatin chemotherapy and/or radiation. The goal is to catch hearing loss early so treatment can be adjusted.
Atlanta, GeorgiaAges 18 years+ - NCT04325425RecruitingPhase 2
First chemotherapy for metastatic aggressive neuroendocrine cancer
This Phase 2 study tests a chemotherapy approach in people with metastatic grade 3 (high-grade) neuroendocrine cancer or a related rare mixed tumor. It may help shrink tumors and control disease when standard first treatments have not yet been given.
CaenAges 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 - NCT07130786RecruitingPhase 2
Preventing seizures with medication for brain tumors in movement area
This study tests whether giving a seizure medication (levetiracetam) to people with brain tumors in the movement area can prevent seizures. It compares taking the medication to not taking it, starting before any seizure occurs.
Boston, MassachusettsAges 18 years+ - NCT06295965Recruiting
Blood changes and cancer therapy study
This study looks at why some people develop blood disorders after cancer treatment. It monitors changes in blood cells to better predict and prevent these problems.
Seattle, WashingtonAges Any age - 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+ - NCT06327100RecruitingPhase 1/Phase 2
Tasquinimod for myelofibrosis after JAK inhibitor failure
This trial tests a new drug called tasquinimod, either alone or combined with ruxolitinib, for people with myelofibrosis. It's for patients who haven't gotten enough help from standard treatments or who can't take them.
Houston, TexasAges 18 years+ - NCT06661915RecruitingPhase 2
Combination treatment for advanced myeloproliferative neoplasms
This study tests whether adding a new drug called iadademstat to the standard treatment ASTX727 helps people with advanced myeloproliferative neoplasms (blood cancers that cause the bone marrow to make too many cells). The goal is to see if the combination is safe and works better than the standard treatment alone.
Irvine, CaliforniaAges 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+ - NCT04339777RecruitingPhase 2
Bone marrow transplant for inherited immune system disorders
This trial studies how well a donor bone marrow (stem cell) transplant works for people with inherited immune system problems (called immune deficiencies). It’s for patients who haven’t improved with usual treatment or don’t have another good option.
Bethesda, MarylandAges 4–69 - NCT04609046RecruitingPhase 1
Lenalidomide and nivolumab added to standard treatment for brain lymphoma
This Phase 1 trial tests adding two cancer medicines—lenalidomide and nivolumab—to the usual treatment for primary CNS diffuse large B-cell lymphoma (a type of lymphoma in the brain/spinal fluid). The goal is to see if the combination is safe and if it works better than the usual approach.
Los Angeles, CaliforniaAges 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+ - NCT06914479RecruitingPhase 1
Gene therapy and valacyclovir for recurrent brain tumors in young people
This trial tests a new gene therapy that uses two special viruses and an oral antiviral drug (valacyclovir) to treat brain tumors that have come back in children and young adults. The therapy is given right after surgery to remove the tumor, with the goal of helping your immune system fight the cancer.
Ann Arbor, MichiganAges 3–39
Hear when a new Cancer of Unknown Primary trial opens
We’ll email you when one opens — at most once a week, no account needed, unsubscribe anytime.
Common questions
- Are there clinical trials for cancer of unknown primary?
- Yes. Clin2 currently lists 42 recruiting cancer of unknown primary 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 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 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.