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Flow Cytometry Analysis of Immune Cell Subsets within the Murine Spleen, Bone Marrow, Lymph Nodes and Synovial Tissue in an Osteoarthritis Model
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Bone marrow changes in osteoarthritis

Thomas M Link1, Xiaojuan Li

  • 1Department of Radiology and Biomedical Imaging, University of California at San Francisco, San Francisco, CA 94131, USA. tmlink@radiology.ucsf.edu

Seminars in Musculoskeletal Radiology
|June 7, 2011
PubMed

Insights

Magnetic resonance imaging (MRI) reveals bone marrow edema, a key indicator of osteoarthritis (OA) progression. This finding, linked to various pathologies and symptoms, highlights MRI

Area of Science:

  • Radiology
  • Orthopedics
  • Pathology

Background:

  • Magnetic resonance imaging (MRI) is increasingly vital for assessing osteoarthritis (OA) disease burden and progression.
  • Bone marrow edema pattern is a characteristic MR finding in OA, reflecting diverse underlying pathologies.

Purpose of the Study:

  • To elucidate the histological characteristics, associated imaging findings, and clinical significance of bone marrow edema in osteoarthritis.
  • To establish bone marrow edema pattern as a key MRI biomarker in OA.

Main Methods:

  • Review of MRI findings in osteoarthritis patients.
  • Correlation of MR imaging features with histological examination of bone marrow edema.
  • Analysis of clinical data regarding pain associated with bone marrow edema.

Main Results:

  • Bone marrow edema pattern on MRI is histologically characterized by necrosis, fibrosis, microfractures, and remodeling.
  • MRI findings of bone marrow edema correlate with subchondral cysts, cartilage defects, meniscal degeneration, and insufficiency fractures, with size and prevalence linked to OA severity.
  • The clinical significance of bone marrow edema is debated, though some studies link it to pain.

Conclusions:

  • Bone marrow signal abnormalities, particularly edema patterns, are frequent and significant MRI findings in osteoarthritis.
  • These abnormalities represent a spectrum of pathologies and are associated with other OA features and potential clinical symptoms.

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