If you are interested in the topic, this will bring up links to the 
work being done at Boston University on calorie restricted ketogenic 
diets and brain cancer.

https://www.google.com/search?q=boston+university+cancer+ketogenic

Here is the head of the program
http://www.bc.edu/schools/cas/biology/facadmin/seyfried.html

and an interview with him from Jimmy Moore's podcast
http://www.thelivinlowcarbshow.com/shownotes/1172/dr-thomas-seyfried-on-killer-carbs-ketosis-as-a-cancer-cure-episode-302/

Here is a quote, from Carbwire's blog, about this episode:

"You'll hear Dr. Seyfried talk about his original interest in the 
subject of ketogenic diets for epilepsy when he was at Yale 
University (and the lack of interest in them at the time), how a 
ketogenic shrinks brain tumors, the details of his KetoCal study, the 
controversy over using mice instead of humans in his study, what 
"calorie-restriction" translates from mice to humans, why a 400-500 
calorie, ketogenic diet will make you "metabolically healthy," 
whether a ketogenic diet is useful on other cancers, why the 
ketogenic diet is a "non-toxic approach to the management of cancer," 
the best diet to eat for the prevention of cancer, and why a 7-10 day 
distilled water-only fast annually is the best way to ward off 
cancers of all types. "

( full text here: 
http://www.carbwire.com/2009/11/04/a-400-500-calorie-ketogenic-diet-will-make-you-metabolically-healthy-boston-college-researcher-says 
)