+A **cyst** is a closed sac-like structure, often found within [Tissue](/wiki/tissue), that can contain fluid, air, or semi-solid material. These benign formations represent a distinct, contained [Lesion](/wiki/lesion) within the body, separate from the surrounding tissue.
+## See also
+- [Tumor](/wiki/tumor)
+- [Abscess](/wiki/abscess)
+- [Inflammation](/wiki/inflammation)
... 1 more lines