3920
Bmi - 1 transgenic mice were born with enlarged lateral ventricles and a minority developed idiopathic hydrocephalus as adults , but none of the transgenic mice formed detectable CNS tumors , even when aged .
 lateral ventricles, CNS tumors
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 lateral ventricles, CNS tumors