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New research shows that young elite athletes will not commonly manifest bone marrow edema in the SI joint following activity.
A study in Arthritis & Rheumatology assessed for MRI findings commonly seen in patients with axial spondyloarthropathy (axial Spa). (Citation source: https://buff.ly/2DrlCgB)
Danish researchers studied 20 recreational runners and 22 professional ice hockey players to determine the frequency of bone marrow edema in the sacroiliac joint. The runners received MRI scans of their sacroiliac joints before and 24 hours after a 6.2-km competitive run, and the hockey players received scans at the end of their competitive season.
The proportion fulfilling the ASAS definition concordantly by ≥2/3 readers were 30-35%/41%, respectively. The posterior lower ilium was the single most affected SI joint, followed by the anterior upper sacrum. Erosions were absent and may be the key for discriminating disease from normal variations.
Active athletes may meet ASAS definition in 30%-41% for bone marrow edema.