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Cyst (skin)

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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A cystic lesion in the skin is an epithelial-lined cavity that contains viscous or semi-solid epithelial degradation products.

Cystic lesions in the skin may be the result of various pathologies:

  • most arise from elements of hair follicles e.g. epidermal cysts, pilar cysts
  • from developmental epithelial remnants e.g. inclusion dermoid cysts
  • from traumatic implantation of epithelial fragments i.e. implantation dermoid cysts
  • ganglions are derived from the synovium of a joint or tendon sheath

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