Thanks to this post above! Just happened to see a Baastrup situation 4 day ago in a 55 yo. L3-4. Preserved interspinous space, not bone-on-bone situation, with very clear area of high intensity signal on STIR sagittal. I used a 22G Quincke, and when I entered the area, a little bit of clear serous fluid even came up into the hub, although aspiration was negative for any additional fluid. Injected steroid and anesthetic. As she was checking out, she said she felt a little better, but was not a slam dunk, so I was a little uncertain how she would do, but I just heard that she is doing great, back to work, and was able to stop the short-term oxycodone I gave her for acute pain. Ashamed to say that I have not done this before, so I must have missed this many times. I will be looking for this more.