Table of Contents
Seborrhoeic keratosis is a benign skin growth originating from keratinocytes.
Suggested approach to seborrhoeic keratosis OSCE station
Describing lesions
- Lesion
- ‘There is a well-demarcated dark brown papule on the upper left part of the patient’s back.’
- ‘This is 4mm in diameter and has a regular border, with a stuck-on appearance.’
- ‘The lesion is raised, with a rough surface, but there are no secondary features.’
- ‘This lesion is characteristic of a seborrhoeic keratosis.’

Differential diagnosis
- Melanoma
- Melanocytic naevus
- Dermatofibroma
- Pigmented basal cell carcinoma
- Acanthosis nigricans
Management
- Reassurance
- Remove surgically if diagnostic uncertainty
- Remove using cryotherapy or curettage and cautery if cosmetic concerns
- Topical corticosteroids for itchy/irritated lesions
Questions
What is a complication of seborrheic warts?
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What is Leser-Trélat sign?
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