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Pelvic marrow in adults

C D Levine1, M E Schweitzer, S M Ehrlich

  • 1Department of Radiology, Thomas Jefferson University, Philadelphia, Pennsylvania.

Skeletal Radiology
|July 1, 1994
PubMed
Summary
This summary is machine-generated.

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Magnetic resonance (MR) imaging of hematopoietic marrow in older men shows less marrow overall, with specific patterns of change. These findings help identify normal marrow variations and diagnose subtle pathologies.

Area of Science:

  • Radiology
  • Medical Imaging
  • Skeletal System Imaging

Background:

  • Hematopoietic marrow appearance on magnetic resonance (MR) imaging is variable.
  • Distinguishing normal from pathologic marrow can be challenging due to subtle differences.

Purpose of the Study:

  • To evaluate the characteristics of hematopoietic marrow in older men using MR imaging.
  • To establish morphologic criteria for identifying normal hematopoietic marrow patterns in the pelvis.

Main Methods:

  • Review of 82 pelvic MR examinations in men without osseous metastases.
  • Evaluation of the fraction and characteristics of residual hematopoietic marrow.
  • Analysis of marrow patterns in relation to patient age and location within the pelvis.

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Main Results:

  • Older patients (mean age 66) had less hematopoietic marrow (80% < 40% residual).
  • Hematopoietic marrow conversion to fatty marrow followed a consistent pattern: diffuse to focal, with sharp margins.
  • Periarticular hematopoietic marrow was common in the sacroiliac region (72%).
  • Hematopoietic marrow persisted in juxtacortical locations (87%), was symmetric (100%), less intense than fat on T2-weighted images (100%), and often had a central fat focus (98%).

Conclusions:

  • Established morphologic criteria aid in recognizing normal pelvic hematopoietic marrow patterns on MR imaging.
  • These criteria assist in the confident diagnosis of hematopoietic marrow foci.
  • Understanding age-related changes in marrow appearance is crucial for accurate interpretation.