Related Experiment Video

Updated: Sep 6, 2026

Ex vivo Mimicry of Normal and Abnormal Human Hematopoiesis
11:50

Ex vivo Mimicry of Normal and Abnormal Human Hematopoiesis

Published on: April 10, 2012

Extramedullary hematopoiesis in the kidneys in infant siblings with myelofibrosis

S K Fernbach1, K A Feinstein

  • 1Children's Memorial Hospital, Chicago, Illinois.

Pediatric Radiology
|January 1, 1992
PubMed

Insights

Extramedullary hematopoiesis (EMH), the formation of blood products outside the bone marrow, is rare in children. This study describes two young girls with severe anemia who developed EMH, including rare kidney involvement.

Area of Science:

  • Hematology
  • Pediatric Medicine
  • Pathophysiology

Background:

  • Extramedullary hematopoiesis (EMH) typically occurs in adults with severe anemia due to the limited capacity of pediatric bone marrow.
  • Children usually compensate for anemia by utilizing their extensive red marrow reserves.

Observation:

  • Two young girls with severe anemia were observed.
  • These patients exhibited extramedullary hematopoiesis (EMH) despite their young age.
  • One patient presented with documented and uncommon renal involvement.

Findings:

  • The observed cases challenge the typical age distribution of EMH.
  • The findings highlight the potential for EMH in pediatric patients with severe anemia who cannot adequately produce blood products in the marrow.
  • Rare renal involvement in pediatric EMH was documented.

Implications:

  • This study expands the understanding of EMH presentation in pediatric populations.
  • It suggests that EMH should be considered in the differential diagnosis of severe anemia in children, even with unusual organ involvement.
  • Further research into the mechanisms and management of pediatric EMH is warranted.

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