Dermatology · UKMLA & AKT
Epidermoid and pilar cysts
A free high-yield preview for the UKMLA Applied Knowledge Test, covering how to recognise this condition. The full SA Note notes add investigations, management and complications, with practice questions on this topic.
Key high-yield points
- Both epidermoid and pilar cysts contain keratin, not sebum - 'sebaceous cyst' is a misnomer
- Epidermoid cyst - arises from infundibular portion of hair follicle; cyst wall has a granular layer; contents are soft, white-yellow, cheesy keratin
- Pilar cyst - arises from outer root sheath; wall has NO granular layer; contents are compact, dry, solid keratin; strongly associated with scalp
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