The objective of this study is to assess the ability of intrathecal α-L-iduronidase to be administered safely 24 months [clinicaltrials_resource:3128850c9cb24b710ce9da544283406b]

The Experimental treatment group will receive study assessments and intrathecal laronidase (1.74 mg laronidase) treatments every 1-3 months beginning at start of study.

The objective of this study is to assess the ability of intrathecal α-L-iduronidase to be administered safely 24 months [clinicaltrials_resource:3128850c9cb24b710ce9da544283406b]

The Experimental treatment group will receive study assessments and intrathecal laronidase (1.74 mg laronidase) treatments every 1-3 months beginning at start of study.