What is the definition or description of: epidermal cyst?

Epidermal Cyst: An epidermal cyst or sebaceous cyst is a collection of smelly white oily substance (keratin). They can occur all over the body, and are usually treated with decompression or excision depending on their size. Large cysts tend to recurr unless they are completely excised. Infected cysts need to be drained.

Inclusion cyst: An epidermal cyst is a collection of white cells and cellular debris that collects in the dermis and becomes walled off from the surrounding tissues. These can occasionally become infected. The best treatment is excision including the wall of the cyst.

Epidermal cyst: Epidermoid cysts are masses within the skin that result from the proliferation of epidermal cells within a circumscribed space of the dermis.