cyst

A cyst is a closed sac or capsule that forms in the body, which can contain a variety of substances like fluid, air, or other material. They can develop in many tissues and organs, often appearing as a bump or lump. Cysts may be caused by infections, blockages, or other health issues, and their size and appearance can vary. While some cysts are harmless and may resolve on their own, others might require medical attention if they cause discomfort or growth. Diagnosis typically involves imaging studies, and treatment can range from observation to surgical removal.