The majority of these conditions (MPSI, MPSIIIA, MPSIIIB, MPSIIIC, MPSIIID, MPSIVA and B, MPSVI, MPSVII and the very rare MPSIX) are inherited in an autosomal recessive manner, while MPSII is X-linked recessive (Celik et al., 2021). Here, IDUA is linked to mucopolysaccharidosis type 7.