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.
- Cyst, synovial, of the popliteal space
Cyst, synovial, of the popliteal space: A swelling in the space behind the knee (the popliteal space). The swelling is composed of a membrane-lined sac filled with synovial fluid that has escaped from the joint. Commonly called Baker’s cyst.
- Cyst, tarsal
Cyst, tarsal: Also called a chalazion or a Meibomian cyst, an inflammation of the oil gland of the eyelid.
- Cyst, thyroglossal
Cyst, thyroglossal: A fluid-filled sac that is present at birth and located in the midline of the neck. A thyroglossal cyst is a congenital malformation (a birth defect). It results from incomplete closure of a segment of the thyroglossal duct, a tube-like structure that normally closes as the embryo develops. Also called a thyroglossal duct […]