8549
Symptoms Children affected by pilocytic astrocytoma can present with different symptoms that might include failure to thrive ( lack of appropriate weight gain ) , headache , nausea , vomiting , irritability , difficulty to coordinate movements and visual complaints ( including nystagmus ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None