The participation of minors in biobank research can offer great benefits for science and
health care. However, as minors are a vulnerable population they are also in need of
adequate protective measures when they are enrolled in research. Research using biobanked
biological samples from children poses additional ethical issues to those raised by
research using adult biobanks. For example, small children have only limited capacity, if
any, to understand the meaning and implications of the research and to give a documented
agreement to it. Older minors are gradually acquiring this capacity. We describe
principles for good practice related to the inclusion of minors in biobank research,
focusing on issues related to benefits and subsidiarity, consent, proportionality and
return of results. Some of these issues are currently heavily debated, and we conclude by
providing principles for good practice for policy makers of biobanks, researchers and
anyone involved in dealing with stored tissue samples from children. Actual implementation
of the principles will vary according to different jurisdictions.