A branchial cyst, according to the Cleveland Clinic, is a small fluid-filled sac that may look like a lump under the skin on the side of the neck. It is considered one of the most common neck mass ...

Brachial cleft cysts are small sacs filled with fluid that look like lumps under the skin on the side of the neck, according to the Cleveland Clinic. They can appear at any age, though they are ...

The growing cyst had reached the size of a small grapefruit ... showing that even champions face health challenges—and how they overcome them is what truly matters. Serena Williams' story ...