2006
Correlating the results of these two methods and clinicopathological factors , the c - kit expression and c - kit gene mutation rates were 95 . 0 % ( 19 / 20 ) and 0 in benign GIST , and were 98 . 4 % ( 61 / 62 ) , 54 . 8 % ( 34 / 62 ) in malignant GIST .
 benign GIST, malignant GIST
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 benign GIST, malignant GIST