31609
In cancer , therapies targeting the EGF receptor are thwarted by the co-activation of alternate receptor tyrosine kinases ( RTK ) that have partial functional overlap with the EGF receptor ( and are therefore degenerate ) , but are not targeted by the same specific EGF receptor inhibitor .
 cancer
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 cancer