A CT-guided biopsy of the paraspinal lesions revealed extramedullary hematopoiesis
that was indistinguishable from that in the nasal mass.
Cutaneous and pericardial extramedullary hematopoiesis
with cardiac tamponade in chronic myeloid leukemia.
occurs as a compensatory mechanism for abnormal hematopoiesis when normal red marrow is unable to function because of deficiency disorders or because of various pluripotent stem cell disorders.
Another puzzling aspect of this case is the presence of extramedullary hematopoiesis
in the kidney.
is a well-recognized process in which the body attempts to maintain erythrogenesis in response to an alteration in the normal production of red blood cells.
One case each contained fibrin thrombi, foci of extramedullary hematopoiesis
, calcification, and noncaseating epithelioid granulomas.
In summary, the MPNs are involved with one or more of the following features: overproduction of one or more cell lines, hypercellular marrow or bone marrow fibrosis, cytogenetic abnormalities, point mutations, extramedullary hematopoiesis
, hemorrhagic bleeding and or thrombosis and can transform into an acute leukemia.
In the birds exhibiting hepatomegaly and splenomegaly, extramedullary hematopoiesis
and mild congestion were present in these organs.
Philadelphia-negative chronic myeloproliferative disorders (CMDs) are characterized by clonal proliferation of hematopoietic progenitor cells in the bone marrow and by extramedullary hematopoiesis
associated with increased [CD34.
Material on general features covers bone marrow structure and morphology, bone marrow examination and reporting, ancillary studies, and extramedullary hematopoiesis
There was no clinical or laboratory evidence of platelet dysfunction or of extramedullary hematopoiesis
The continued myelofibrosis either results in or is associated with (it is not clear which) extramedullary hematopoiesis
in the spleen and, to a lesser extent, in other organs (Figure 5).