Condition
Unknown Primary Tumors clinical trials and research
As of November 12, 2026, Find a Trial lists 4 Unknown Primary Tumors clinical trials that are recruiting, at sites in 3 countries (most in Canada (2), China (1), Germany (1)). By phase: Phase 2 (1). Every study is explained in plain English. Data from ClinicalTrials.gov and NIH RePORTER, updated November 12, 2026.
- 4Clinical trials
- 3Countries
Newest Unknown Primary Tumors clinical trials
| Study | Phase | Where | Status | Registered |
|---|---|---|---|---|
| High-precision detection of leftover cancer using a liquid-biopsy platform (SHERLOCK) | — | Toronto, Ontario | Recruiting | Apr 13, 2026 |
| Classifying cancer of unknown primary using DNA methylation data | — | Guangzhou, Guangdong | Recruiting | Nov 21, 2023 |
| Improving diagnosis of hematological diseases using advanced sequencing techniques | — | Munich | Recruiting | Sep 16, 2021 |
| Effects of Atezolizumab on Cancer Patients with Sensitive Tumor DNA or RNA | Phase 2 | Vancouver, British Columbia and 1 other locations | Recruiting | Feb 17, 2020 |
All recruiting trials (4)
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High-precision detection of leftover cancer using a liquid-biopsy platform (SHERLOCK)
This project will test whether sensitive blood and other fluid tests for circulating tumor DNA can find leftover cancer (minimal residual disease) in adults treated with curative intent for breast, lung, melanoma, gynecologic, or genitourinary cancers.
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Classifying cancer of unknown primary using DNA methylation data
This study is trying to see if a new computer model can help doctors figure out what type of cancer someone has when they don't know where it started, by looking at patterns in DNA from cancer samples.
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Improving diagnosis of hematological diseases using advanced sequencing techniques
This study is testing new genetic sequencing methods to help doctors better diagnose blood disorders in patients who currently have unclear or unusual symptoms.
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Effects of Atezolizumab on Cancer Patients with Sensitive Tumor DNA or RNA
This study is testing if atezolizumab can help cancer patients with certain tumor types that show they might respond well to the treatment.
Related topics
Quick answers
How many Unknown Primary Tumors clinical trials are recruiting right now?
4, as of November 12, 2026. We update this list each time we refresh our data from ClinicalTrials.gov.
Where are these trials running?
In 3 countries. The most sites are in Canada (2 trials), China (1 trial), Germany (1 trial). Each study page lists its sites and which ones are recruiting.
What phases are they in?
Phase 2: 1. Trials with no phase listed are usually device, behavioural or observational studies.
How do I join one?
Open a study, check the "Is this trial a fit for you?" section, then contact the study team listed on the page. They will ask a few screening questions. Asking is free and does not commit you to anything. Talk it over with your doctor first.
Find the studies that fit you
A list is a starting point. Tell us your situation in your own words and we'll rank the studies that match and explain why. It's free and needs no account.