A cyst is a growth, usually benign, surrounded by a
capsule and may contain be semi-solid or contain fluid or gas. They range from
microscopic to quite large and may occur almost anywhere in the
body.
An ulcer is a sore, or an excavation of the surface
of a tissue or an organ due to inflammation. Eventually, the dead tissue is removed and
a sore is the result. They may occur in the stomach, the eye, the foot, or anywhere that
inflammation may occur.
For more information on ulcers, see
the link below.
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