Adult stem cells, or mature stem cells, are cells that are in already existing tissue. (bookbrowse.com)
But it was vague on details and disregarded existing tissue banks collected through clinical trials for decades, critics said. (science.sciencemag.org)
In Emma's case, doctors planned to remove her testicle, shift her urethral hole, and carve a labia and clitoris from existing tissue. (discovermagazine.com)