Cystic Hygroma
Background
Cystic Hygromas are non-malignant malformations of lymphatic vessels, usually occurring around the head and neck region. They are usually evident by three years of age. They may be single or multiple. If they are large they may be detected on antenatal ultrasound scans. They are usually slow-growing and may spontaneously resolve or reduce in size. Rapid growth does occasionally occur if there is internal bleeding into the cysts or if there is a complicating infection.