Brachial cleft cyst is a cyst that is formed when one of the four brachial cleft does not properly close during the embryonic stage. The cyst may become filled with thick yellowish fluid from sinus drainage. The brachial cleft cyst may also become infected. Brachial cleft cysts appear as a raised smooth area on the lateral portion of the neck. It may not be noticeable until the infant reaches adolescents. Typically 1-2% of the patients that are diagnosed present bilateral cysts. There may be a congenital link with the formation of brachial cleft cyst. The cyst is painless and does not diminish the health or wellness of the patient unless an infection develops. If the cyst becomes infected then antibiotics should be prescribed. The second treatment option is to have the cyst surgically removed.
The first image is MRI in sagittal view. The middle image is an MRI in coronal view. The last image is of a Brachial Cleft Cyst being
surgically removed.
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