Vesiculopustular eruption associated with transient myeloproliferative disorder.

Transient myeloproliferative disorder (TMD) is a hematologic abnormality usually associated with Down syndrome that may present with a skin eruption in addition to typical systemic findings. We report a case of a patient with TMD and a vesiculopustular eruption without the phenotypic characteristics of Down syndrome who was found to have mosaic trisomy 21. Mutations of the globin transcription factor 1 gene, GATA1, are associated with both TMD and acute megakaryocytic leukemia.