Yes, you can get the stone out. Did your mom have a sonogram to see where the stone is stuck?
First thing she can do is to take one teaspoon of Epsom Salt in apple juice and see if the stone moves. If it does not then you prepare for Liver/GB flush. One week before the flush she needs to consume a lot of apples, apple juice or take Malic acid tablets. She can also take Turmeric and Gold Coin Grass everyday, these herbs help the stones to brake into smaller pieces. During this week she needs to eat only light meals, no meat, cheese, butter, etc.
Then do the flush as per Dr. Clark protocol.
For cancer she needs to be on raw juices from organic fruits and vegetables separately. Check out Dr. Gerson therapy. You can do this therapy at home.
After the flush she should also eat light foods for a day or two.
Raw organic foods are the best way to heal her body.
You all as a family should watch two movies, "The Beautiful Truth" and "Forks over Knives".