Causes of Cervical Cystic Hygroma

To ensure the baby’s healthy transition from the maternal body, many pregnant women regularly attend prenatal check-ups at hospitals. Some conditions may not be readily apparent initially but become evident after a period of time—for instance, the development of a fetal nuchal cystic hygroma. This condition is unfamiliar to most people and may even be entirely unknown to some. So, what causes nuchal cystic hygroma?

Causes of Nuchal Cystic Hygroma

Nuchal cystic hygroma—also known as congenital cervical cystic hygroma—is caused by a congenital abnormality in lymphatic tissue development. Affected infants should undergo evaluation at a reputable public hospital. Treatment options include intralesional injection therapy. In severe cases, surgical excision may be required.

Cystic lymphangioma arises due to developmental defects in the fetal lymphatic system and represents a common type of fetal lymphatic malformation, frequently occurring in the head, neck, and back regions. The size and structural characteristics of cystic lymphangiomas vary considerably. The cyst wall may be thick and can envelop the fetal head, neck, and upper trunk, often appearing diffuse. It has been confirmed that septa within these cysts are composed of fetal cervical connective tissue, serving as a distinguishing histological marker for cystic lymphangioma.

This condition is commonly associated with generalized fetal edema (hydrops fetalis). Alternatively, it may manifest locally—for example, unilateral limb swelling while other parts of the body remain unaffected. Ultrasound features include a large, thick-walled cyst surrounding the fetal head, neck, or other anatomical sites, with internal reticular septations visible within the cyst. We hope this information proves helpful!