Neurology · Pathway 56

Cystic Hygroma

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Key points

Cystic hygroma is a congenital lymphatic lesion (lymphangioma), typically found in the neck and classically on the LEFT side.
Most are evident at birth, and around 90% present before 2 years of age.
Do not confuse with BRANCHIAL CYST: an oval, mobile cystic mass, typically presenting in early adulthood, arising between sternocleidomastoid and the pharynx.