I have a 22 year old son who was diagnosed with a Dandy Walker cyst at age 9 mo. He had his first shunt placed at age 7. During the next 7 years he had 9 revisions. Then he has had no problems until Nov. 2009. In the last 7 months he has had 6 revisions, moving the distal tubing from his peritoneal cavity to his gall bladder and next week to his pleural cavity. He is so frustrated and in such pain. Don't know what to expect with this new procedure...