2387
The histological grading was certified in 68 cases : 12 G1 , 39 G2 , 17 G3 ; extracapsular spread was found in 20 / 54 cases ( 37 % ) .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None