+ Monoclonal Gammapathy of Undetermined Significance (MGUS)
+ Other Lymphoproliferative Diseases
+ Histiocytoses
+ Histiocytosis X (Langerhans Cell Histiocytosis)
+ Letterer-Siwe Histiocytosis
+ Hand-Schüller-Christian Histiocytosis
+ Eosinophilic Granuloma
+ Histiocytic Sarcoma
+ Metastatic Infiltration of the Bone Marrow
+ Posttheraupetic a Posttransplant Hematopoietic Changes
+ Posttheraupetic Hematopoietic Changes
+ Restitution of Hematopoiesis
+ Persistent Alterations of Hematopoiesis.
+ Posttransplant Alterations of Hematopoiesis
+ Pathology of the Bone
+ Other Disorders
Erythroid hyperplasia
Etiology, pathogenesis
results from increased erythropoietin production due to chronic hypoxemia
(high altitude stays, chronic lung diseases, cyanotic
heart defects) or (rarely) due to erythropoietin-producing tumors (for example
renal cell carcinoma)
or from an increased peripheral erythrocyte loss (for example hemolytic anemias)
Histology
The marrow is normo- or hypercellular with increased
normoblastic erythropoiesis, which is organised in clusters. Erytropoietic precursors mature,
often there is a left shift. Other hematopoietic lineages are normal.