Keratin implantation cyst
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Keratin implantation cysts are cysts lined by an
epidermal The epidermis is the outermost of the three layers that comprise the skin, the inner layers being the dermis and hypodermis. The epidermis layer provides a barrier to infection from environmental pathogens and regulates the amount of water relea ...
sac and filled with a form of
keratin Keratin () is one of a family of structural fibrous proteins also known as ''scleroproteins''. Alpha-keratin (α-keratin) is a type of keratin found in vertebrates. It is the key structural material making up scales, hair, nails, feathers, ho ...
. They are a primarily cutaneous condition, but they are occasionally observed under the nail (anatomy), of a finger or toe.Freedberg, et al. (2003). ''Fitzpatrick's Dermatology in General Medicine''. (6th ed.). McGraw-Hill. .


See also

* Nail (anatomy)


References

{{Epidermal-growth-stub Epidermal nevi, neoplasms, and cysts