Branchial cleft cysts are one of the most common congenital anomalies. They may present in different locations, although they are often found along the sternocleidomastoid muscle (SCM). Pain, superinfection, and symptoms due to mass effect have been reported.1 We describe a patient with a very rare complication of significant bradycardia due to carotid sinus compression that was caused by a branchial cleft cyst. Although cardiac sick sinus syndrome has been a recognized but rare complication of head and neck cancers, congenital neck masses have not been well documented as a cause.2 To our knowledge, there has been no prior report of a branchial cleft cyst causing carotid sinus bradycardia.
Alexander AAZ, Groblewski JC, Davidson BJ. Branchial Cleft Cyst Causing Carotid Sinus Syndrome. Arch Otolaryngol Head Neck Surg. 2009;135(10):1045-1047. doi:10.1001/archotol.125.12.1390