Freezing testicular tissue to help preserve fertility in young boys with cancer
Official title: Cryopreservation of Prepubertal Testicular Tissue for Preservation
Run by University of Edinburgh · NCT06063551 · Data updated 2026-11-12
This study tests if freezing testicular tissue from young boys with cancer can help them preserve their ability to have children later on.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 1 Day to 18 Years |
| Sex | Men only |
| Enrollment | 100 (estimated) |
| Sponsor | University of Edinburgh Academic / other |
| Locations | 1 site (Edinburgh, Lothian) |
| Status | Recruiting |
| Started | April 1, 2016 |
| Main results expected | April 2061 |
| Study ends | April 2061 |
| Registry record updated | November 20, 2025 |
| Trial ID | NCT06063551 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are pre- and peri-pubertal boys facing cancer treatments with a greater than 80% risk of infertility.
✕Probably not a fit
Patients who can produce a semen sample or have pre-existing testicular issues may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This study aims to cryopreserve testicular tissue from prepubertal boys who are about to undergo cancer treatment that poses a high risk of infertility. With informed consent from guardians, testis tissue biopsies will be collected and frozen for future use in restoring fertility. The study also includes laboratory research to understand germ cell development and optimize freezing methods. Patients will be followed up to assess the long-term effects of the procedure on their endocrine function.
Why it matters
Potential benefit: If successful, this approach could provide a viable option for preserving fertility in young boys undergoing cancer treatment.
How similar studies have gone: While the approach of cryopreserving testicular tissue is being explored, this specific application for prepubertal boys is relatively novel and has not been widely tested.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Pre- and peripubertal boys * Due to receive cancer treatment that is predicted to have a high risk (\>80%) of infertility * Consent to removal of testicular tissue for storage and research * Unable to produce a semen sample by masturbation Exclusion Criteria: * Participation in study would delay treatment * Too unwell to undergo the procedure * Pre-existing testicular pathology/previous testicular surgery (eg orchidopexy) * Able to produce a semen sample for cryopreservation
Where it's running
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University of Edinburgh
Edinburgh, Lothian, United Kingdom Recruiting
Study contacts
- Principal investigator: Rod T Mitchell, MBChB — University of Edinburgh
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.