What is the difference between bone marrow aspiration and bone marrow biopsy?

Medullary puncture is to use a bone piercing needle to penetrate the bone rich in bone marrow, take out the needle core, connect the syringe (syringe) to suck the bone marrow fluid by negative pressure.

For bone marrow biopsy, after the bone marrow puncture, a rigid forceps of the biopsy needle will be used to bite a part of the bone marrow biopsy. This is especially helpful when the bone marrow puncture is repeatedly "drained". For example, some diseases such as bone marrow fibrosis. If you just have a bone marrow puncture, then it is often dry, and no bone marrow fluid can be drawn.

So bone marrow biopsy is a means of further diagnosis

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