New proton beam study aims to cut cancer treatment side effects
NCT ID NCT07601672
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests proton beam therapy for stage II seminoma, a testicular cancer that is highly curable. The goal is to see if this more targeted radiation can treat the cancer effectively while reducing long-term side effects and the risk of developing another cancer later in life. About 20 men will take part to measure treatment safety and quality of life.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 20 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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May 2026
An estimate. Start dates often move.
- Expected to finish
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May 2031
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Male participants only
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Age ≥ 18 years * Male gender * ECOG Performance status 0 - 1 * Histologically confirmed diagnosis of testicular seminoma * Stage IIA - IIB disease with metastatic involvement limited to retroperitoneal lymph nodes measuring ≤3 cm in greatest diameter * Prior radical orchiectomy * Clinical indication for radiotherapy * Written informed consent provided Exclusion Criteria: * Non-seminomatous germ cell tumor histology * Incomplete definitive surgical orchiectomy, including diagnostic biopsy alone * Prior or concurrent second malignancy other than non-melanoma skin cancer, unless disease free for a minimum of five years * Prior radiotherapy to the abdominal or pelvic region * Known severe, active co-morbidity * Inability or refusal to provide informed consent
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- Testicular cancer treatment: which is easier on patients?
- Testicular cancer patients needed for landmark treatment reduction study
- Blood marker may predict cancer return in testicular tumor patients
- Immunotherapy duo takes on resistant germ cell tumors