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Etymology: L, congenitus, born with; Gk, kystis, bag
a cyst present at birth, such as a dermoid cyst resulting from an embryonic defect in the skin or midline structures.
A cyst present at birth and resulting from abnormal development, such as a dermoid cyst, imperfect closure of a structure as in spina bifida cystica, or nonclosure of embryonic clefts, ducts, or tubules, such as cervical cysts.
See also: cyst