What is the definition of a cutaneous cyst?

A cutaneous cyst is defined as a benign closed sac in the skin that may contain fluid, semisolid material, or other substances. These cysts are typically formed from the blockage of skin glands or by the accumulation of certain materials in a enclosed space. They are usually not harmful and can vary in size, texture, and appearance depending on their type and location.

The characterization of a cutaneous cyst as benign is crucial, as it distinguishes them from malignant tumors or other harmful skin conditions. Such cysts can be painless and may require no treatment unless they become infected or symptomatic.

Other definitions such as an infected skin area or a malignant tumor do not accurately represent the nature of a cutaneous cyst, as they pertain to different pathologies that involve inflammation or cancer, rather than the encapsulated nature of a cyst. Visible growths associated with acne may represent different lesions, such as comedones or pustules, but again, these do not describe the cystic structure that is specific to cutaneous cysts.