A 59-year-old white man with known myeloproliferative neoplasm (MPN) and myelodysplastic syndrome (MDS) presented with worsening leucocytosis and thrombocytosis in the setting of a presumed infection. The patient had been diagnosed 2 years earlier with an MPN/MDS overlap syndrome, based on characteristic mutations in JAK2, IDH1 and SRSF2. During his current evaluation, he was noted to have new microcytosis, with a mean corpuscular volume of ~70 fL down from his baseline of ~90 fL. His laboratory workup showed normal iron studies, normal haemoglobin electrophoresis, and no evidence of haemoglobin H or mutations in his ATRX coding region. Without any identifiable cause of his new microcytosis, he was given a presumptive diagnosis of acquired thalassemia in the setting of his unusual MPN/MDS overlap syndrome.
- haematology (incl blood transfusion)
- medical education
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Contributors MM wrote the manuscript with support from TK and DBS.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
Patient consent for publication Obtained.
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