Cyst
Cyst: A closed sac or capsule, usually filled with fluid or semisolid material.
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- Cyst of the ovary, follicular
Cyst of the ovary, follicular: A fluid-filled sac in the ovary, the most common type of ovarian cyst. It results from the growth of a follicle. A follicle is the fluid-filled cyst that contains an egg. In some cycles, this follicle grows larger than normal and does not rupture to release the egg. Normally it […]
- Cyst, Baker
Cyst, Baker: A swelling in the space behind the knee (the popliteal space) that is composed of a membrane-lined sac filled with synovial fluid that has escaped from the joint. Also known as synovial cyst of the popliteal space.
- Cyst, Meibomian
Cyst, Meibomian: An inflammation of the oil gland of the eyelid. Also known as chalazion or tarsal cyst.
- Cyst, pilonidal
Cyst, pilonidal: An abscess that occurs in the cleft between the buttocks. Pilonidal cysts form frequently in adolescence after long trips that involve sitting, and they may be painful. Treatment frequently involves surgery if not responsive to heat applications and antibiotics.
- Cyst, sebaceous
Cyst, sebaceous: A sebaceous cyst is a rounded swollen area of the skin formed by an abnormal sac of retained excretion (sebum) from the sebaceous follicles.