If you think or you know you have a problem the only way to get anything done is by getting a totally independent opinion, unfortunately the only way is by going to another area because the Neuro's tend to stick together because they don't want to upset there colleagues. I found that you need very good support from family, friends & especially your family doctor. You really have to stick up for your rights & be assertive like many others my scans looked o.k but I knew my shunt was faulty. As soon as the Medtronic shunt was replaced all my symptoms disappeared immediately. It has now been 4 years with no problems.:. I wish you all well . Good LUCK