One of the endocrinologists I work with, John Palmer DO, recently saw a patient with a left-sided thyroid cyst. She had had a thyroid ultrasound at an outlying hospital and then another one done ...

In most cases, a branchial cleft cyst isn’t dangerous. But it may cause skin irritation, skin infection, or — in very rare adult cases — cancer. Read more about branchial cleft cysts.

That said, branchial cleft cysts are one of the most common forms of neck masses or lumps, especially in children," the clinic's website notes. While benign, meaning noncancerous, ...

A branchial cyst, a.k.a. a branchial cleft cyst, is a small, fluid-filled sac that an look like a lump under the skin on the side of your neck, according to the Cleveland Clinic.

That said, branchial cleft cysts are one of the most common forms of neck masses or lumps, especially in children," the clinic's website notes. While benign, meaning noncancerous, ...