Transient Abnormal Myelopoiesis: Aggressive and Potentially Lethal Progression-A Case Report

Area of Science:

• Hematology
• Neonatal Medicine
• Genetics

Background:

• Transient abnormal myelopoiesis (TAM) is a hematologic disorder common in newborns with Down syndrome (DS).
• While often self-limiting, TAM can rarely progress aggressively, necessitating medical intervention.
• Low-dose cytarabine is a potential treatment for aggressive forms of TAM.

Observation:

• This report details a case of aggressive TAM in a neonate with DS.
• The patient received two rounds of low-dose cytarabine treatment.
• Despite a significant reduction in blast count from 60% to 1%, the patient's condition deteriorated.

Findings:

• Aggressive TAM progression occurred despite standard low-dose cytarabine therapy.
• Severe liver failure developed and worsened, proving refractory to treatment.
• The patient ultimately succumbed to the complications of aggressive TAM and liver failure.

Implications:

• This case underscores the limitations of current low-dose cytarabine treatment for severe TAM.
• Liver failure presents a significant and challenging prognostic indicator in aggressive TAM.
• Further research is needed to identify more effective therapeutic strategies for refractory aggressive TAM, particularly concerning liver involvement.