Epidermoid cysts, also known as epidermal inclusion cysts or sebaceous cysts, are benign, slow-growing lesions that originate from the epidermis. They are commonly found on the skin, particularly in areas with abundant sebaceous glands such as the face, neck, and upper trunk. These cysts are encapsulated and filled with keratin, a protein that is a key component of the skin, hair, and nails.
