Involution of a cystic hygroma of the face following local infection.

This report describes the case of a cystic hygroma on the face of a four-month old child. There was a history of congenital swelling of the right hemiface that decreased considerably following signs of infection. The cystic hygroma or lymphangioma is a rare congenital malformation of the lymphatic system that is present at birth in 50% of cases. It is usually located on the neck or face. It generally grows slowly and progressively and may compress and infiltrate adjacent structures. Its spontaneous regression occurs in only 6% of cases.