What disease requires myelination?

Bone marrow examination is to use a bone marrow puncture needle to extract a certain amount of bone marrow fluid from different parts of the human body (mainly in the sternum, ilium, etc.) for cytological examination, parasite and pathogen examination, and bone marrow fluid culture to diagnose certain diseases. a way. Bone marrow is the main hematopoietic organ after birth. During childhood, all bone marrow contains active red marrow. From the age of 4, the red marrow in the tubular bones is gradually replaced by fat and becomes yellow marrow. By the age of 20, it is limited to flat marrow. Bones (ribs, sternum, skull), spine, humerus and proximal femur have red marrow involved in hematopoiesis. Yellow bone marrow examination is mainly used to diagnose certain hematopoietic system diseases. Its indications are: 1. Various anemias of unknown origin: Through smear examination, we can understand the nature of abnormal red blood cell production and the cell types of anemia, such as megaloblastic anemia and aplastic anemia. 2. Suspected leukemia, especially the diagnosis of leukocytosis

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