A rare case of spinal myeloid sarcoma

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Background: Myeloid sarcoma (MS), a rare extramedullary tumor composed of myeloid blast cells, is classified by the World Health Organization as a subtype of acute myeloid leukemia (AML). Isolated, primary, or nonleukemic MS has an incidence of 2/1,000,000 adults and constitutes only 0.7% of all AML cases. MS presentations vary widely, with spinal involvement being rare. Case Description: A-year-old male presented with interscapular pain radiating to the right upper arm/neck but was neurologically intact. Once diagnosed with isolated spinal MS, he underwent a surgical decompression followed by local irradiation, systemic chemotherapy, and bone marrow transplantation. Eight months postoperatively, however, he experienced a graft-versus-host rejection and required additional therapies. Conclusion: Establishing the diagnosis of MS is challenging and typically requires histological confirmation (i.e., the presence of myeloblasts and granulocytic cells). However, optimal treatment strategies remain elusive; despite radiation, chemotherapy, bone marrow transplant/other local therapies, the overall long-term prognosis for MS remains poor.

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