520
CONCLUSIONS The DPC4 gene may play a role as a tumor - suppressor gene in a fraction of colorectal cancers ; however , while allelic loss at 18q21 is very often seen in colorectal cancers , only a minority show DPC4 mutations , suggesting that there might be another tumor - suppressor gene in this chromosome region . .
 Disease: colorectal cancers; Disease: colorectal cancers
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 Disease: colorectal cancers; Disease: colorectal cancers