extramedullary hematopoiesis


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hematopoiesis

 [he″mah-to-poi-e´sis]
the formation and development of blood cells. In the embryo and fetus it takes place in a variety of sites including the liver, spleen, thymus, lymph nodes, and bone marrow; from birth throughout the rest of life it is mainly in the bone marrow with a small amount occurring in lymph nodes. Called also hematogenesis, hemogenesis, and hemopoiesis.
extramedullary hematopoiesis the formation and development of blood cells outside the bone marrow, as in the spleen, liver, and lymph nodes.

extramedullary hematopoiesis

The production of blood cells in tissues other than bone marrow, e.g., in the liver or spleen. It occurs in severe or chronic anemias and other diseases that affect blood cell formation. Synonym: myeloid metaplasia
See also: hematopoiesis
References in periodicals archive ?
Rakeii, "Visual failure caused by suprasellar extramedullary hematopoiesis in beta thalassemia: case report," Neurosurgery, vol.
Mendel, "Ectopic extramedullary hematopoiesis: evaluation and treatment of a rare and benign paraspinal/epidural tumor," Journal of Neurosurgery: Spine, vol.
The most common sites of extramedullary hematopoiesis are the liver, spleen and lymph nodes.
Anemia and Extramedullary Hematopoiesis. Hematological abnormalities are common in SLE due to anemia of chronic disease, iron deficiency, autoimmune hemolytic anemia, macrophage activation, and so forth [16].
Cutaneous extramedullary hematopoiesis has been encountered exceptionally in association with haematological malignancies.
Taher et al.14 study demonstrated that patients with [beta]-TI experience many complications that are thought to be more frequent in [beta]-TI compared with [beta]-TM: thrombosis, extramedullary hematopoiesis, pulmonary hypertension, leg ulcers, and cholelithiasis.
Kujawski et al., "Osteomyelosclerosis, anemia and extramedullary hematopoiesis in mice lacking the transcription factor NFATc2," Haematologica, vol.
In our patient, given the history of multiple myeloma, extramedullary hematopoiesis was also suggested.
Extramedullary hematopoiesis (EM H) is the production of hematopoietic precursors outside the bone marrow cavity, and it causes mass effects according to its localization.
A CT-guided fine needle aspiration of the left renal sinus mass showed adipose tissue, hemosiderin pigment and hematopoietic tissue, raising the differential diagnosis of extramedullary hematopoiesis (EH) and extra-adrenal myelolipoma (EM).
Introduction: Extramedullary hematopoiesis is most likely to occur during fetal life; however, it can occur as a compensatory mechanism in different types of anemia.
In the birds exhibiting hepatomegaly and splenomegaly, extramedullary hematopoiesis and mild congestion were present in these organs.