“I would use this information and say, ‘Well you’re having inflammatory back pain, but let’s go review things,’ ” he said. “ ‘If you don’t have the true spondyloarthropathy or ankylosing spondylitis now, there’s a chance that this will go away. It’s almost 50-50, or we still don’t know what it is even if you’re having some symptoms (after 15 years).’ ”
Other important findings underscore the need for a complete clinical picture rather than just findings on imaging for an axial SpA diagnosis, Dr. Kavanaugh said. Researchers examined MRI images of new military recruits who were healthy with no back pain (Rheumatology [Oxford]. 2018 Mar 1;57[3]:508-13). They found that 23% of them at baseline – and 37% after strenuous training – had MRI findings that would qualify as positive for spondyloarthritis by Assessment of Spondyloarthritis international Society criteria. But they wouldn’t meet the definition of disease.
More recent findings showed similar results in imaging of healthy runners and hockey players (Arthritis Rheumatol. 2018 May;70[5]:736-45), with 30%-40% of them having MRI findings that would be considered positive on ASAS, Dr. Kavanaugh said.
“These were just people who were out stressing their joints,” he said. “We were super excited at the start of having MRI because now we can look and evaluate the activity within a joint. But I think, like everything, we have to take it with a little bit of caution. Just in and of itself, without the clinical picture, it does not diagnose axial spondyloarthropathy.”