Is the potential for tumors from unregulated growth of embryonic stem cells worth the risk?
Much more scientific work and well-designed comparative studies are needed to answer this question because we still do not know everything about regulated and unregulated growth control. All therapies have risk-benefit ratios, and many suffering people might have longer lives and higher quality of life with treatment. If we understood all the regulatory mechanisms that define cell growth and regulation and could harness them for optimal use, then the potential benefits are staggering.