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Lesch - Nyhan syndrome caused by a complete deficiency of hypoxanthine guanine phosphoribosyltransferase ( HPRT ) is the result of a heterogeneous group of germ line mutations .
 Lesch - Nyhan syndrome, complete deficiency of hypoxanthine guanine phosphoribosyltransferase
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 Lesch - Nyhan syndrome, complete deficiency of hypoxanthine guanine phosphoribosyltransferase