4419
Erdheim - Chester disease : a distinct lipoidosis or part of the spectrum of histiocytosis ? Erdheim - Chester disease has always been considered a distinct lipoidosis based on clinical and radiographic criteria .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None