Marrow Fat Content and Composition in β-Thalassemia: A Study using 1 H-MRS
Umi Nabilah Ismail1, Che Ahmad Azlan1, Shasha Khairullah2
1Department of Biomedical Imaging, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
Journal of Magnetic Resonance Imaging : JMRI
|November 25, 2020
Summary
Beta-thalassemia, a genetic blood disorder, significantly reduces bone marrow fat and increases fat unsaturation. This study used MRI to assess these changes in the proximal femur.
Area of Science:
- Biomedical Imaging
- Hematology
- Genetic Disorders
Background:
- Beta-thalassemia is a genetic disorder characterized by ineffective erythropoiesis, leading to altered bone marrow composition.
- Ineffective erythropoiesis (IE) is known to impact the cellular makeup of bone marrow.
Purpose of the Study:
- To investigate the effects of IE on bone marrow fat content and unsaturation in the proximal femur.
- Utilizing 1H-MRS to quantify changes in marrow fat in beta-thalassemia patients.
Main Methods:
- Prospective study involving 16 beta-thalassemia patients and 7 controls.
- 1H-MRS scans were performed on four proximal femur regions (diaphysis, femoral neck, femoral head, greater trochanter) at 3.0T.
- Statistical analysis included the Jonckheere-Terpstra test and K-means clustering to assess disease severity correlations.
Main Results:
- Bone marrow fat fraction (BMFF) significantly decreased with increasing beta-thalassemia severity in both red and yellow marrow regions.
- Fat unsaturation index (UI) showed a significant increasing trend with disease severity.
- Three distinct patterns of marrow adipogenesis were identified based on BMFF in the diaphysis and greater trochanter.
Conclusions:
- Beta-thalassemia is associated with a reduction in bone marrow fat.
- Increased levels of fat unsaturation in the bone marrow are linked to beta-thalassemia severity.
- These findings highlight significant alterations in bone marrow composition due to beta-thalassemia.
