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Diffuse vertebral marrow changes at MRI: Multiple myeloma or normal?

B C Vande Berg1, T Kirchgesner2, S Acid2

  • 1Department of Radiology, IREC, Saint Luc University Hospital, Université Catholique de Louvain, Hippocrate Avenue 10/2942, 1200, Brussels, Belgium. Bruno.vandeberg@uclouvain.be.

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This summary is machine-generated.

Magnetic resonance imaging (MRI) reveals five marrow involvement patterns in monoclonal plasma cell proliferative disorders. While MRI aids staging, its limited specificity requires careful analysis with other methods to differentiate from benign conditions.

Keywords:
CancerHematopoietic marrow hyperplasiaMRIMultiple myeloma

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Area of Science:

  • Radiology and Imaging Science
  • Oncology and Hematology
  • Medical Diagnostics

Background:

  • Monoclonal plasma cell proliferative disorders, including multiple myeloma (MM), exhibit diverse marrow involvement patterns.
  • These patterns range from diffuse to focal, variegated, and normal, reflecting varied disease natural histories.
  • Magnetic resonance imaging (MRI) of axial bone marrow is used for staging these disorders.

Purpose of the Study:

  • To describe the five MRI patterns of bone marrow involvement in monoclonal plasma cell proliferative disorders.
  • To evaluate the role of MRI in staging these conditions.
  • To highlight the challenges in differentiating neoplastic infiltration from benign marrow changes using MRI.

Main Methods:

  • Observation of five distinct MRI patterns of bone marrow involvement: diffuse, focal, combined diffuse and focal, variegated, and normal.
  • Analysis of fat- and fluid-sensitive MR images.
  • Consideration of quantitative marrow assessment using MRI and FDG-PET for differentiation.

Main Results:

  • Five MRI patterns of marrow involvement were identified in patients with marrow proliferative disorders, including MM.
  • MRI findings can mimic benign conditions like hematopoietic marrow hyperplasia and heterogeneities in elderly patients.
  • Distinguishing neoplastic infiltration from benign changes requires careful image analysis and potentially complementary imaging techniques.

Conclusions:

  • MRI patterns of bone marrow involvement in monoclonal plasma cell disorders correlate with disease natural history.
  • While MRI contributes to staging, its limited specificity and sensitivity necessitate caution for disease detection and characterization.
  • Combining MRI with FDG-PET and careful analysis of image sequences can improve differentiation between neoplastic and benign marrow changes.