Cysts: An epidermal inclusion cyst is lined with epidermal cells and filled with debris, usually keratin if the cells lining the wall are keratin forming cells. The cysts form usually as a result of trauma. A dermoid cyst is lined with lined with epidermal cells and skin appendages of the dermis like hair follicles and sebaceous gland. They are congenital cysts that may arise in the eyelid or orbit. A ductal cyst is formed from a duct of a sweat gland or other secreting gland. It is lined with 2 layers of epithelium. Back to Eyelid