STEM CELL. STEM CELL For the following reasons, adult stem cells may eventually prove to be better for cell therapy than embryonic stem cells: their greater availability in adult tissue, the absence of immune-response rejection, their decreased disposition for tumors. Removed from the patient, stem cells can be cultured and multiplied to attain a quantity that is sufficient to treat sickness or injuries. Here, representation of adult stem cells, multipotential progenitors, and committed precu