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Busulfan-induced sideroblastic anemia.

L A Fernandez¹, E Zayed

¹Department of Medicine and Pathology, Dalhousie University, Halifax, Nova Scotia.

American Journal of Hematology

|July 1, 1988

Summary

This summary is machine-generated.

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Busulfan treatment for chronic myelogenous leukemia (CML) can cause pancytopenia. A surprising case revealed busulfan may induce sideroblastic anemia, resolving after drug cessation.

Area of Science:

Hematology
Oncology
Pharmacology

Background:

Chronic myelogenous leukemia (CML) is typically managed with busulfan during its stable phase.
Busulfan-induced bone marrow toxicity, leading to pancytopenia via hypoplasia or aplasia, is a known complication.

Observation:

A Philadelphia chromosome-positive CML patient on busulfan developed pancytopenia.
Bone marrow examination revealed hyperplasia with sideroblastic changes, not hypoplasia/aplasia.
Sideroblastic changes are not a typical busulfan toxicity and suggested acute leukemia transformation.

Findings:

Busulfan was discontinued, and supportive care was initiated.
Remarkably, sideroblastic changes resolved within 22 weeks of stopping busulfan.
Bone marrow morphology reverted to features consistent with CML.

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Implications:

This case challenges the presumed mechanism of busulfan-induced pancytopenia in CML.
It suggests busulfan may directly cause sideroblastic anemia.
Further investigation into busulfan's potential to induce sideroblastic changes is warranted.