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Abstract #1293

Prevalence and Clinical Significance of Residual or Reconverted Red Bone Marrow on Knee MRI in Young Adults

Benny Antony1, Jasveen Kaur1, Tao Meng1, Alison Venn1, Flavia Cicuttini2, Lyn March3, Marita Cross3, Terence Dwyer4, Andrew Halliday5, Graeme Jones1, and Changhai Ding1

1Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia, 2Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia, 3Institute of Bone and Joint Research, University of Sydney, Sydney, Australia, 4Murdoch Childrens Research Institute, Melbourne, Australia, 5Radiology, Royal Hobart Hospital, Hobart, Australia

An abnormal distribution of residual or reconverted red bone marrow (RBM) has been identified on routine knee MRI. We aimed to identify the prevalence and the association between RBM and symptoms and structural abnormalities in a young population (n=327, aged 31-41 years). The presence of RBM in the distal femoral, proximal tibial and fibular metaphysis was graded based on the percentage of the metaphysis occupied (grade 0 to 3). Reconverted or residual RBM around the knee joint was present only among females and always involved the distal femoral region. RBM was associated with overweight measures and knee joint pain.

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