The retired tennis star said she first discovered the growth, which was found to be non-cancerous, in May and recently had it removed on the advice of doctors.

The tennis icon Serena Williams recently opened up about her health journey after having a grapefruit-sized cyst removed from her neck.

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. They can appear at any age, but are usually found in kids.