Dermatology · UKMLA & AKT
Dermatofibroma
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
- Site - most commonly lower limbs (anterior shin); also trunk and upper limbs
- Morphology - firm, well-circumscribed, dome-shaped dermal nodule, 0.5-1.5 cm
- Colour - skin-coloured, pink, or light to dark brown
- Dimple (Fitzpatrick) sign - pathognomonic: lateral pinching causes central inward puckering due to fibrous tethering to overlying epidermis
- Symptoms - usually asymptomatic; occasionally mildly pruritic or tender
- Demographics - young to middle-aged adults; female predominance; multiple lesions (≥5) associated with immunosuppression (HIV, SLE)
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