Ophthalmic Knowledge for Residents: Pathology

Cyst Hair Glands Dermoid Commonly Located Lined Stratified

Front

What is a dermoid cyst? What causes it? Where are they most commonly located?

Back

● Cyst lined by stratified squamous epithelium with keratinization ● May contain keratin and hair (choristoma) ● Wall of cyst has adnexal structures: sebaceous glands, sweat glands, hair follicles ● Rupture of cyst produces prominent granulomatous inflammatory reaction ● Result of abnormal embryonic epithelial nest that becomes entrapped ● Most often in superotemporal orbit near frontozygomatic suture

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