Dermatology · UKMLA & AKT
Sebaceous hyperplasia
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
- Small (1-5 mm), dome-shaped, soft, yellow/pale yellow-white papule - reflects lipid-rich sebocytes
- Central umbilication (dell) - defining feature; central pore corresponding to dilated follicular infundibulum
- Lobulated surface - multilobulated, cauliflower-like, yellow lobules around the central dell
- Distribution - sun-exposed face: forehead, nose, cheeks, temples
- Asymptomatic - no itch, spontaneous bleeding, or ulceration; if present, reassess
- Multiple lesions - consider ciclosporin therapy or Muir-Torre syndrome
Dermoscopy shows a crown of vessels (hairpin/linear) around a central follicular opening with pale yellow lobules - highly characteristic and helps exclude BCC.
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