Cutaneous cyst

What it means

A hollow mass located in the skin that is surrounded by an epithelium-lined wall and is well demarcated from the adjacent tissue. Cysts are often said to be sac-like and may contain serous liquid or semisolid material.

In contrast to cysts, vesicles, pustules and bullae do not have a complete epithelial lining and are therefore less well demarcated.

Rare diseases that can present with this3

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category