Dermatology · UKMLA & AKT
Seborrhoeic keratosis
A free high-yield preview for the UKMLA Applied Knowledge Test. Below are the key points to recognise seborrhoeic keratosis — the full SA Note notes add investigations, management, complications and 10 practice questions.
Key high-yield points
- Stuck-on appearance - well-demarcated, raised, pigmented plaque resembling candle wax stuck to skin
- Colour - pale tan to dark brown or black; can be variegated
- Surface - rough, warty, greasy, or cerebriform with visible crypts
- Milia-like cysts - white/yellow keratin-filled cysts visible on surface or dermoscopy
- Comedo-like openings - dark plugged follicular openings on dermoscopy
- Sites - trunk, face, upper limbs; spares palms and soles
- Epidemiology - common in individuals >50; prevalence increases with age
- Dermatosis papulosa nigra - variant with multiple small dark brown-black papules on face/neck in darker skin types, from adolescence
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