MPS I is divided into three subtypes based on severity of symptoms. All three types result from an absence of, or insufficient levels of, the enzyme alpha-L-iduronidase.  MPS I H or<unk>  syndrome is the most severe of the MPS I subtypes. The other two types are MPS I S or Scheie syndrome and MPS I H-S or<unk> -Scheie syndrome.<unk> 's Syndrome is often classified as a lysosomal storage disease and is mechanistically related to Hunter's Syndrome (X-linked recessive).
Hurler syndrome classification
Cowden syndrome classification
Barter Syndrome classification
Sezary syndrome classification
Cretinism classification
Bannayan-Riley-Ruvalcaba syndrome classification
Boerhaave syndrome classification
Brugada syndrome classification