Branchial Cleft Cyst

**Semantic type:** Finding

**Definition:** A congenital epithelial cyst that develops due to failure of obliteration of the second branchial cleft during embryonic development. It appears as a lump on the side of the neck.

**Synonyms:** - Branchial Cyst - Cyst of Branchial Cleft - Cyst of the Branchial Cleft