All of the following statements regarding branchial cysts are true except: (A) Seen in mediastinum, (B) 50-70% occur in lung, (C) Are commonly infected, (D) Multilocular
Answer is B. .BRANCHIAL CYST It arises from the remnants of second branchial cleft. Normally 2nd, 3rd, 4th clefts disappear to form a smooth neck. Persistent 2nd cleft is called as cervical sinus which eventually gets sequestered to form branchial cyst. Features * Swelling in the neck beneath the anterior border of upper third of the sternomastoid muscle. It is smooth, soft, fluctuant, often transilluminant with a sensation of 'Half-filled double hot water bottle'. ref:SRB&;s manual of surgery,ed 3,pg no 381