Last SI xray was initially reported by NHS as showing "minimal sclerosis", then re-reported by NHS as being "normal", followed by a much more detailed specialist musculoskeletal radiologist report of the same film that then showed "partial ankylosis and reduced joint space" on one side, with "some concern about the presence of sacroiliitis" even though there were no surface erosions.

Latest report (two years later) from NHS shows "mild degenerative change with some sclerosis on the iliac side of both joints but no evidence of erosions".

Question: is sclerosis on the iliac side of both joints enough to confirm Grade 2 changes now, especially given that SI pain responds incredibly well to steroids and NSAIDs?

I am trying to get a copy of the actual film so I can send it to the rheumatologist or the private musculoskeletal radiology specialist that did the second opinion report of the first, so I can get more than a one-sentence report and a bit more detail.