Cystic hygroma
Cystic hygroma is a type of birth defect that affects the lymphatic system. It is a fluid-filled sac or cyst that forms in the neck or head area of a developing fetus, and it can vary in size from small to large. This can lead to the formation of cysts or fluid-filled sacs, which can become large and cause swelling and other complications. Cystic hygroma is more common in females than males and may occur in isolation or as part of a larger syndrome. The diagnosis of cystic hygroma can be made prenatally through ultrasound or other imaging tests, and it may also be detected at birth. Treatment for cystic hygroma typically involves surgical removal of the cyst, although in some cases it may not be possible to remove it completely. In more severe cases, other treatments such as chemotherapy or radiation therapy may be necessary..