Lumbosacral extradural extramedullary hematopoiesis in thalassemia major causing spinal canal stenosis
- Department of Rheumatology, St. John’s Medical College and Hospital, Bengaluru, Karnataka, India,
- Department of Neurosurgery, Rutgers Robert Wood Johnson University Hospital, New Brunswick, New Jersey, United States.
Department of Neurosurgery, Rutgers Robert Wood Johnson University Hospital, New Brunswick, New Jersey, United States.
DOI:10.25259/SNI_563_2020Copyright: © 2020 Surgical Neurology International This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-Share Alike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.
How to cite this article: Sumatha Channapatna Suresh1, Bharath Raju2, Fareed Jumah2, Anil Nanda2. Lumbosacral extradural extramedullary hematopoiesis in thalassemia major causing spinal canal stenosis. 08-Oct-2020;11:331
How to cite this URL: Sumatha Channapatna Suresh1, Bharath Raju2, Fareed Jumah2, Anil Nanda2. Lumbosacral extradural extramedullary hematopoiesis in thalassemia major causing spinal canal stenosis. 08-Oct-2020;11:331. Available from: https://surgicalneurologyint.com/surgicalint-articles/10318/
Background: Extramedullary hematopoiesis (EH) is common in patients with ineffective erythropoiesis like thalassemia major (TM). EH commonly involves intra-abdominal organs (e.g., spleen and liver), but rarely involves vertebral bodies. Here, we reviewed images of EH contributing to spinal canal stenosis.
Case Description: A 19-year-old male with beta-thalassemia major (TM) presented with pain and bilateral lower extremity neurogenic claudication. Bilaterally, on examination, he had positive straight leg raising to 30°, a loss of the Achilles responses, and decreased pain appreciation in the L5S1 distributions. The lumbar MR showed anterior epidural lobulated mass lesions at L5 and S1, contributing to marked canal stenosis. Following an L5/S1 laminectomy for decompression, the biopsy revealed extramedullary hematopoietic tissue.
Conclusion: Patients presenting with the lower extremity symptoms/signs, ranging from low back pain to neurogenic claudication and even paraplegia, may have EH secondary to TM. Treatment options include hypertransfusion, local radiation therapy, and/or surgical decompression.
Keywords: Beta-thalassemia, Extramedullary hematopoiesis, Radiculopathy, Spinal stenosis
Extramedullary hematopoiesis (EH) is observed in many hemoglobinopathies, including beta-thalassemia major (TM). Here, we report a patient with TM who, while receiving chronic transfusions, developed epidural EH resulting in spinal canal stenosis at the L5/S1 level requiring operative decompression.
A 19-year-old male with beta-TM complicated by chronic iron overload, presented with bilateral lower extremity pain, numbness, and neurogenic claudication. Bilaterally, on examination, he had positive straight leg raising to 30°, a loss of the Achilles responses, and decreased sensation in the L5-S1 distributions. When the lumbar MR demonstrated L5S1 EH responsible for spinal canal stenosis [
(a and b) Sagittal T2-weighted images showing L5, S1 level anterior epidural hypointense lobulated mass lesion attached to the posterior surface of the vertebral body with severe canal stenosis. (c and d) Axial T2-weighted images showing bi-lobulated lesion protruding from the vertebral body with near total canal stenosis.
Location and frequency of occurrence of spinal EH with TM
EH has a prevalence in transfusion-dependent beta-thalassemia of <1%.[
Differential diagnosis and MR findings of EH with TM
The differential diagnoses for EH spinal lesions include an epidural infection, vertebral fracture, or epidural hematoma.[
Treatment options for EH with TM
Treatment of EH with TM include; hypertransfusion, local radiation therapy, and/or surgical decompression. Blood transfusions can prevent further progression of EH pseudotumor.[
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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