Abstract
Branchial cysts usually occur on the lateral sideof the neck, are believed to be derived from the branchial arch organ, and from the epithelial inclusion within the cervical lymph node.
Recently we experienced a case of the branchial cyst on thelateral side of the neck in a 19-year-old man.
The cyst contents were the solution like Café au lait, and showed high activity on LDH, γ-GTP and amylase by biochemical examination.
On high activity of amylase, we suggested that adenocytes were related to derivation of branchial cysts.