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Mucopolysaccharidosis IVA ( MPS IVA ; OMIM # 253000 ) , a lysosomal storage disorder caused by a deficiency of N - acetylgalactosamine - 6 - sulfate sulfatase ( GALNS ) , has variable clinical phenotypes .
 Mucopolysaccharidosis IVA, MPS IVA, lysosomal storage disorder, deficiency of N - acetylgalactosamine - 6 - sulfate sulfatase
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 Mucopolysaccharidosis IVA, MPS IVA, lysosomal storage disorder, deficiency of N - acetylgalactosamine - 6 - sulfate sulfatase