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Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
Published on: January 29, 2018
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Thalassemia bone disease: a 19-year longitudinal analysis.
Phillip Wong1, Peter J Fuller, Matthew T Gillespie
1Prince Henry's Institute of Medical Research, Clayton, Australia; Department of Endocrinology, Monash Health, Clayton, Australia; Department of Medicine, Monash University, Clayton, Australia.
Summary
Thalassemia patients experience significant bone mineral density loss, particularly at the femoral neck. Males with beta-thalassemia show greater bone loss and fracture risk, suggesting higher hemoglobin targets may be beneficial.
Area of Science:
- Hematology
- Endocrinology
- Osteology
Background:
- Thalassemia is an inherited blood disorder causing ineffective red blood cell production.
- Severe thalassemia necessitates chronic transfusions, leading to complications like iron overload and hormonal issues.
- These complications contribute to bone deformities and reduced bone mineral density (BMD).
Purpose of the Study:
- To investigate the longitudinal changes in BMD in transfusion-dependent thalassemia patients.
- To identify risk factors associated with bone loss in this population.
- To determine optimal monitoring sites for BMD in thalassemia patients.
Main Methods:
- A 19-year retrospective longitudinal study of 277 transfusion-dependent thalassemia subjects.
- Dual-energy X-ray absorptiometry (DXA) used to assess BMD at lumbar spine, femoral neck, and total body.
- Linear mixed-model analysis to evaluate BMD changes and associated risk factors.
Main Results:
- Significant longitudinal decline in BMD observed at the femoral neck (FN) and total body (TB).
- FN Z-score decline was more pronounced in males and accelerated in recent years, coinciding with a switch in iron chelator therapy.
- Higher hemoglobin levels correlated positively with better BMD at the TB and lumbar spine.
Conclusions:
- The femoral neck is the preferred site for monitoring BMD in thalassemia patients.
- Male patients with beta-thalassemia exhibit greater BMD loss and fracture risk.
- Higher hemoglobin targets may mitigate BMD decline; deferasirox's role in bone loss requires further investigation.
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