Sadly for the kids that are diagnosed with Hunter syndrome they will likely die in their second decade of their life.
There is current research enzyme replacement therapy and many are being to study stem cell transplants.
"Hunter Syndrome." Check Orphan, www.checkorphan.org/diseases/hunter-syndrome. Accessed 4 Feb. 1017.
Polgreen, Lynda E., et al. "Pilot study of the safety and effect od abalimumab on pain, physical function, and musculoskeletal diseass in mucopolysaccharidosis types l and ll." PubMed Central, www.ncbi.nlm.nih.gov/pmc/articles/PMC5238608/. Accessed 3 Feb. 2017.
Wraith, J. Edmond, et al. "Initial repost from the Hunter Outcome Survey."Genetics in Medicine, www.nature.com/gim/journal/v10/n7/full/gim200879a.html. Accessed 2 Feb. 2017.