specifically refers to implantation of epidermal elements into the dermis. The term infundibular cyst refers to the site of origin of the cyst: the infundibular portion of the hair follicle. The majority of epidermal inclusion cysts originate from the infundibular portion of the hair follicle, thus explaining the interchangeable, yet inaccurate, use of these two terms. Epidermoid cyst may be classified as a sebaceous cyst, although technically speaking it is not sebaceous. "True" sebaceous cysts, cysts which originate from sebaceous glands and which contain sebum, are relatively rare and are known as steatocystoma simplex or, if multiple, as steatocystoma multiplex. Medical professionals have suggested that the term sebaceous cyst be avoided since it can be misleading. In practice, however, the term is still often used for epidermoid and pilar cysts. Additional images See also Intracranial epidermoid cyst List of cutaneous neoplasms associated with systemic syndromes Proliferating epidermoid cyst Verrucous cyst References External links Epidermal nevi, neoplasms, and cysts Conditions of the skin appendages