The FDA is cautious in this area because historically a number of stem cell injection therapies have led to tumor formations in the CNS. That said they were no

The FDA is cautious in this area because historically a number of stem cell injection therapies have led to tumor formations in the CNS. That said they were not autologous mesenchymal stem cells. This study gives hope. Refs: http://www.nature.com/stemcells/2009/0902/090226/full/stemcells.2009.32.html http://www.nature.com/stemcells/2009/0902/090226/full/stemce... http://journals.plos.org/plosmedicine/article?id=10.1371/journal.pmed.1000029 http://journals.plos.org/plosmedicine/article?id=10.1371/jou... Old review from early 2000s http://onlinelibrary.wiley.com/doi/10.1002/ana.60000/full http://onlinelibrary.wiley.com/doi/10.1002/ana.60000/full