Epidermoid cyst
| Epidermoid cyst | |
|---|---|
| Epidermal cyst on the neck, inflamed | |
| Specialty | Dermatology | 
An epidermoid cyst or epidermal inclusion cyst is a benign cyst usually found on the skin. The cyst develops out of ectodermal tissue. Histologically, it is made of a thin layer of squamous epithelium.