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Eric Strauch, M.D.

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Cystic hygroma

Definition:

A cystic hygroma is a sac-like structure with a thin wall that most commonly occurs in the head and neck area.

Alternative Names:

lymphangioma

Causes, incidence, and risk factors:

A cystic hygroma is a birth defect. It occurs as the baby grows in the womb from pieces of material that carries fluid and white blood cells (embryonic lymphatic tissue). After birth, a cystic hygroma usually looks like a soft bulge under the skin. The cyst can't be seen until after birth, and sometimes is not noticed until the person is older.

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