Bone cyst, aneurysmal
Bone cyst, aneurysmal: A benign lesion in a bone that contains connective tissue and blood inside a thin bony shell. Aneurysmal bone cysts act like tumors and expand the bone, and they typically occur in the second decade of life. They can affect any bone in the arms, legs, trunk, or skull.
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- Bone cyst, simple
Bone cyst, simple: A solitary fluid-filled cavity (cyst) in a bone, usually in the shaft of a long bone, especially the humerus, in a child. A simple bone cyst can cause pain in or near the bone. Also known as unicameral bone cyst and solitary bone cyst.
- Bone density
Bone density: Bone density is the amount of bone tissue in a certain volume of bone. It can be measured using a special x-ray called a quantitative computed tomogram.
- Bone marrow
The soft blood-forming tissue that fills the cavities of bones and contains fat and immature and mature blood cells, including white blood cells, red blood cells, and platelets. Diseases or drugs that affect the bone marrow can affect the total counts of these cells.
- Bone marrow aspiration
Bone marrow aspiration: The removal of a small amount of liquid bone marrow through a needle. The needle is placed through the top layer of bone, and a liquid sample containing bone marrow cells is obtained through the needle by sucking (aspirating) it into a syringe. The suction causes pain for a few moments. Bone […]
- Bone marrow biopsy
Bone marrow biopsy: The removal of a sample of bone marrow and a small amount of bone through a large needle. Two samples are taken. The first is bone marrow by aspiration (suction with a syringe). The second is a core biopsy to obtain bone marrow along with bone fibers. After the needle is removed, […]