Orbit & optic nerve

Dermoid cyst-orbit

Topic Completed: 1 February 2014

Minor changes: 29 December 2020

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PubMed Search: Dermoid cyst [title] orbit

Nat Pernick, M.D.
Page views in 2020: 406
Page views in 2021 to date: 599
Cite this page: Pernick N. Dermoid cyst-orbit. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/eyeorbitdermoid.html. Accessed December 3rd, 2021.
Definition / general
  • Congenital but may not be clinically evident until age 20 years
  • Most common in superior temporal orbit, also eyelid
Radiology images

AFIP images
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Nasally located cystic lesion

Gross description
  • Soft, nontender, round / oval cyst with thickened wall, 1 cm or less
  • Contain yellow, cheesy material
Microscopic (histologic) description
  • Encapsulated, lined by well differentiated epidermis and dermis, lumen filled with keratinous debris, hair, sebum
  • May have foreign body inflammatory reaction if cyst ruptures
Microscopic (histologic) images

AFIP images
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Inflamed cyst lined by conjunctival type epithelium

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Inflamed cyst lined by skin

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