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Iron deposition in cranial bone marrow with sickle cell disease: MR assessment using a fat suppression technique
K Kaneko1, J H Humbert, M S Kogutt
1Department of Radiology, Tulane University Medical Center, New Orleans, LA 70112-2699.
Abstract:
Thirteen patients with sickle cell disease (SCD) undergoing transfusion therapy and 8 control patients were examined by magnetic resonance imaging to discriminate bone marrow change due to iron deposition from hematologic marrow hyperplasia. Using T1-weighted spin echo images, only two subjects showed extremely low signal intensity marrow compatible with iron deposition. However, using T2-weighted fast spin echo images with fat suppression, cranial bone marrow in SCD patients with transfusion therapy showed considerably lower signal than that of controls. The main cause of marrow signal decrease in SCD patients with transfusion therapy was considered to be iron deposition due to repeated transfusion therapy rather than red marrow hyperplasia.
Insights
Magnetic resonance imaging (MRI) helps distinguish bone marrow changes in sickle cell disease (SCD) patients. T2-weighted MRI effectively identifies iron deposition from transfusions, differentiating it from marrow hyperplasia.
Area of Science:
- Radiology
- Hematology
- Medical Imaging
Background:
- Sickle cell disease (SCD) often requires transfusion therapy.
- Transfusions can lead to iron overload in bone marrow.
- Differentiating iron deposition from marrow hyperplasia is crucial for patient management.
Purpose of the Study:
- To discriminate bone marrow changes in SCD patients due to iron deposition versus hematologic marrow hyperplasia.
- To evaluate the utility of different MRI sequences for this discrimination.
Main Methods:
- Thirteen SCD patients on transfusion therapy and 8 controls underwent MRI.
- T1-weighted spin echo and T2-weighted fast spin echo with fat suppression sequences were used.
- Bone marrow signal intensity was analyzed to assess iron deposition and hyperplasia.
Main Results:
- T1-weighted images showed minimal evidence of iron deposition.
- T2-weighted fast spin echo images revealed significantly lower cranial bone marrow signal in SCD patients compared to controls.
- This decreased signal in SCD patients was attributed to iron deposition.
Conclusions:
- T2-weighted fast spin echo MRI with fat suppression is effective in detecting bone marrow iron deposition in SCD patients.
- Iron deposition due to transfusion therapy is the primary cause of decreased marrow signal, not hyperplasia.
- MRI findings aid in managing iron overload in transfusion-dependent SCD patients.