Alpha-Mannosidosis is a rare Lysosomal Storage Disorder with a worldwide incidence of about 1:500 000. This orphan and devastating disease is caused by the deficiency of the lysosomal alpha-mannosidase (LAMAN) which is responsible for the intralysosomal degradation of mannosyl linked oligosaccharides. To date no causative treatment for alpha-Mannosidosis is available and since most of the children ...