Cyst vs Ulcer - What's the difference?
cyst | ulcer |
A pouch or sac without opening, usually membranous and containing morbid matter, which develops in one of the natural cavities or in the substance of an organ.
(pathology) An open sore of the skin, eyes or mucous membrane, often caused by an initial abrasion and generally maintained by an inflammation and/or an infection.
(pathology) peptic ulcer
(figurative) Anything that festers and corrupts like an open sore; a vice in character.