Branchial Cleft Cyst

A branchial cleft cyst is a birth defect that causes a lump to form in the neck or just beneath the collarbone.

A branchial cleft cyst will develop in the fetus when tissues in the neck and collarbone do not develop properly.

A branchial cleft cyst can form on one or both sides of the neck and may look like an open space that medical professionals refer to as cleft sinuses. The cyst can become infected.

Babies that are born with this birth defect will have small pits, lumps or skin tags on the neck or beneath the collarbone. You may also notice fluid draining from a pit on the neck. A pediatrician will diagnose the condition with a physical examination after birth.

Most of the time, branchial cleft cysts do not require any treatment. However, if the cyst becomes infected or there are continuous drainage problems from the cyst, the child may need antibiotics and surgery to remove them.