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Histological and immunohistochemical investigations ( HE - LFB , CD - 68 , Neurofilament ) revealed degeneration of myelin and axons as well as pseudocystic transformation in areas exposed to vincristine , accompanied by secondary changes with numerous prominent macrophages .
 degeneration of myelin and axons, pseudocystic transformation, vincristine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 degeneration of myelin and axons, pseudocystic transformation, vincristine