The National Disease Research Interchange (NDRI), a non-profit organization based in Philadelphia, PA, coordinates the collection and dissemination of human cells, tissues and organs to researchers and scientists. The Sarcoma Foundation of America just partnered with NDRI to provide sarcoma patients with the opportunity to donate tissues, and have those tissues distributed to scientists who are studying sarcoma:
http://www.curesarcoma.org/documents/uploads/NDRI_Partnership_Press_Release.pdf
About NDRI:
http://ndriresource.org/About-NDRI/18/
How to donate:
http://ndriresource.org/Donor-Programs/The-Power-to-Make-A-Difference/39/