The direct cause of<unk>  is a blockage of the lymphatic system as a fetus develops, although symptoms may not become visible until after the baby is born. The cause remains unknown. Why the embryonic lymph sacs remain disconnected from the rest of the lymphatic system is also not known. Cystic<unk>  that emerges during the first two trimesters of pregnancy is associated with genetic disorders such as Noonan syndrome and trisomies 13, 18, and 21. Chromosomal aneuploidy such as Turner syndrome or Down syndrome were found in 40% of patients with cystic hygroma.
Lymphangioma
Hemangioma
Angioma
Lymphohemangioma
Chorangioma
Chorioangioma
Tufted angioma
Cavernous hemangioma