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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