A branchial cleft cyst is a lump that develops in the neck or just below the collarbone. It is a type of birth defect.
Branchial cleft cysts form during development of the embryo. They occur when tissues in the neck and collarbone area (branchial cleft) fail to develop normally.
The birth defect may appear as open spaces called cleft sinuses, which may develop on one or both sides of the neck. A branchial cleft cyst may form from fluid drained from a sinus. The cyst or sinus can become infected.
Your baby's health care provider may be able to diagnose this condition during a physical examination. The following tests may be done:
Antibiotics will be given if the cyst or sinuses are infected.
Surgery is generally done to remove a branchial cyst to prevent complications, such as repeated infections.
Surgery is usually successful, with good results.
The cyst or sinuses may become infected.
Call for an appointment with your health care provider if you notice a small pit, cleft, or lump in the neck or upper shoulder of your infant, especially if fluid drains from this area.
Wetmore RF, Potsic WP. Differential diagnosis of neck masses. In: Flint PW, Haughey BH, Lund LJ, et al, eds. Cummings Otolaryngology: Head & Neck Surgery. 5th ed. Philadelphia, Pa: Mosby Elsevier; 2010:chap 198.