3310
Ultrastructure of the tumor in 1 patient in whom transurethral resection was performed 2 weeks after alum irrigation revealed well preserved nuclear chromatin , thus , suggesting that whatever changes occur after alum irrigation are short - lived .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
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