Due to ongoing atypical symptoms I had an upright-MRI of my cervical spine last week. These images show dens axis in a slightly decentered position. The top of dens is surrounded with fibrotic structural changes. Fibrosis and malposition of dens lead to narrowing of subarachnoid space. Dens seems to be held or stabilized by surrounding fibrotic structures. Due to the presence of fibrosis damage to the ligaments is suspected.
My surgeon is not sure what to recommend since surgery is too dangerous and outcome is not predictable.
Rohbart, I care, so I was snooping around online and found this other forum where some nice, smart people are discussing the problem. It doesn't give a solution, but jerseypipedreams 08/19/2016 says: "I think everyone can agree this scar tissue deal is getting out of hand. They know it's a common occurance while simutaneously ignoring the fact it's happening and have no practical means to combat the effects of the problem, let alone the actual problem itself. As for the fibrosis, I think there different stages of spinal fibrosis. Lumbar sacral epidural fibrosis is, from what I have read, arachnoiditis, or atleast, presents itself as arachnoiditis. It just has a different, perhaps, more precise way of presenting itself in medical literature..."
I can't speak directly to the issue you're experiencing (my injury was thoracic) or to the posting vintage tracked down, but I have had considerable experience with adhesive arachnoiditis/arachnoid cysts/scar tissue/post-traumatic tethering/syringomyelia/syrinxes, including two rounds of (successful) surgery and expansion duraplasty. I don't know where you're located, but if you do have syrinxes, there is a clinical study going on at NIH. Alternately, Scott Falci is a neurosurgeon in Denver who does a lot of work with/on folks who have tethering. I'm not sure if he's still actively operating, but Barth Green at UM Neurology/Jackson Memorial was one of the pioneers of post-traumatic detethering.
I had a very peculiar constellation of symptoms in the year leading up to my diagnosis and first surgery and it was stressful and confusing. Best wishes for a satisfactory outcome.
"They know it's a common occurance while simutaneously ignoring the fact it's happening and have no practical means to combat the effects of the problem, let alone the actual problem itself." That's exactly what they are doing.
I don't know if this is any help, but Dr Falci has done some work with the Karolinska Institute, (which yes, I know Sweden != Austria) but his office might have some suggestions of folks you could talk to who are at least on the same continent. Best wishes.