What is cystic hygroma?

Cyst of the neck: It's a large cyst of the neck, typically seen in newborns. There is an association with turner's sydrome, where a baby girl is born with only one x chromosome. (45, xo).

A lymphangioma.: A cystic hygroma is a congenital multiloculated lymphatic lesion that can arise anywhere, but is classically found in the left posterior triangle of the neck. This is the most common form of lymphangioma. It contains large cyst like cavities containing watery fluid. Cystic hygromas are benign, but can be disfiguring. It affects children; very rarely it can present in adulthood.