Dermatology · UKMLA & AKT
Epidermoid and pilar cysts
A free high-yield preview for the UKMLA Applied Knowledge Test. Below are the key points to recognise epidermoid and pilar cysts — the full SA Note notes add investigations, management, complications and 10 practice questions.
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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