#$%^&*AU2015218427A120150910.pdf#####H:\imt\Intenvovcn\NRPortbl\DCC\AMT\8305733_l.docx-24/08/2015 ABSTRACT The present invention provides treating LAL deficiency (e.g. Wolmans disease, CESD) comprising administering to a mammal a therapeutically effective amount of lysosomal acid lipase with an effective dosage frequency. Methods of improving growth and liver function, increasing LAL tissue concentration, and increasing LAL activity in a human patient suffering from LAL deficiency are also provided.