3463
Vital imaging using high - resolution ultrasound enhanced with contrast microbubbles revealed that the effects of LeTx on tumor perfusion were remarkably rapid ( less than 24 h ) and resulted in a marked reduction of perfusion within the tumor but not in nontumor tissues .
 tumor, tumor, nontumor tissues
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 tumor, tumor, nontumor tissues