Introduction

Seborrhoeic keratosis is the bread and butter of dermoscopy. It is one of the most common lesions you will encounter in practice — and one of the first that dermoscopy allows you to identify with confidence.

This matters because every seborrhoeic keratosis you recognise correctly is one fewer unnecessary referral. That saves the patient anxiety, saves the system time, and frees specialist capacity for lesions that genuinely need it.

But there is a catch. Some seborrhoeic keratoses do not look classic. Some look unusual enough to mimic melanoma or pigmented basal cell carcinoma. And occasionally, what appears to be a seborrhoeic keratosis turns out to be something else entirely.

This module teaches you to recognise the confident pattern, understand the common variants that can confuse, and — crucially — know when a lesion that looks like a seborrhoeic keratosis should still be referred.

By the end of this module, you will be able to:

1. Recognise the classic dermoscopic features of seborrhoeic keratosis
2. Identify common variants and their dermoscopic appearances
3. Understand mimickers that can resemble seborrhoeic keratosis
4. Know when a lesion that "looks like" a seborrhoeic keratosis should still be referred

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