Several synonyms exist for<unk> s, including epidermal<unk> , infundibular<unk> , keratin<unk>  and epidermal inclusion<unk>  Epidermal inclusion<unk>  more specifically refers to implantation of epidermal elements into the dermis. The term infundibular<unk>  refers to the site of origin of the<unk> : the infundibular portion of the hair follicle. The majority of epidermal inclusion<unk> s originate from the infundibular portion of the hair follicle, thus explaining the interchangeable, yet inaccurate, use of these two terms.<unk>  may be classified as a sebaceous<unk> , although technically speaking it is not sebaceous. "True" sebaceous<unk> s,<unk> s 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<unk>  be avoided since it can be misleading. In practice, however, the term is still often used for<unk>  and pilar<unk> s.
Epidermoid cyst
Palisaded encapsulated neuroma
Dermoid cyst
Ganglion cyst  Ganglion cyst  1
Hidradenoma
Nabothian cyst
Tornwaldt cyst
Sebaceous cyst