Abstract
Objectives
To report the MRI appearance of serous atrophy of bone marrow (SABM) and analyse clinical findings and complications of SABM.
Methods
A retrospective search of MRI examinations of SABM was performed. Symptoms, underlying conditions, MRI findings, delay in diagnosis and associated complications were recorded.
Results
We identified 30 patients (15 male, 15 female; mean age: 46 ± 21 years) with MRI findings of SABM. Underlying conditions included anorexia nervosa (n = 10), cachexia from malignant (n = 5) and non-malignant (n = 7) causes, massive weight loss after bariatric surgery (n = 1), biliary atresia (n = 1), AIDS (n = 3), endocrine disorders (n = 2) and scurvy (n = 1). MRI showed mildly hypointense signal on T1- weighted and hyperintense signal on fat-suppressed fluid-sensitive images of affected bone marrow in all cases and similar signal abnormalities of the adjacent subcutaneous fat in 29/30 cases. Seven patients underwent repeat MRI due to initial misinterpretation of bone marrow signal as technical error. Superimposed fractures of the hips and lower extremities were common (n = 14).
Conclusions
SABM occurs most commonly in anorexia nervosa and cachexia. MRI findings of SABM are often misinterpreted as technical error requiring unnecessary repeat imaging. SABM is frequently associated with fractures of the lower extremities.
Key points
• SABM occurs in several underlying conditions, most commonly anorexia nervosa and cachexia.
• Abnormal marrow signal is often misinterpreted as technical error requiring unnecessary repeat imaging.
• SABM is frequently associated with stress fractures.
• Fractures in SABM can be obscured by marrow signal abnormality on MRI.
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Acknowledgments
We would like to acknowledge Dr. Donald J. Flemming of Hershey, PA; Dr. Devon A. Klein of New York, NY; Dr. Mini Pathria of San Diego, CA; Dr. Jeffrey D. Stanczak of Salisbury, NC and Dr. Daniel M. Walz of Great Neck, NY, USA for their help with the manuscript.
The scientific guarantor of this publication is Miriam A. Bredella. The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article. The authors state that this work has not received any funding. No complex statistical methods were necessary for this paper. Institutional Review Board approval was obtained. Written informed consent was waived by the Institutional Review Board. Methodology: retrospective, cross-sectional study, multicentre study.
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Boutin, R.D., White, L.M., Laor, T. et al. MRI findings of serous atrophy of bone marrow and associated complications. Eur Radiol 25, 2771–2778 (2015). https://doi.org/10.1007/s00330-015-3692-5
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DOI: https://doi.org/10.1007/s00330-015-3692-5