<p>A 23 year old was referred with a relatively long-standing lesion on the right knee that had possibly changed of late. There was no other history. OE there was a smooth dark papule. What is the differential diagnosis?</p>
Dermoscopy - Introduction, Terminology and Structures
A document to help you understand the dermoscopic descriptions used in this blog.
Dermoscopy Algorithm
To help you work through dermoscopic cases.
<p>Dermoscopically there are several well-demarcated, relatively large, purple clods (green arrows) in keeping with a harmless angioma.</p>
<p>The presence of white structures in this particular case should not detract from the history of a relatively long-term lesion in which there are well-demarcated purple clods. </p>
<p>Red, purple, and sometimes black clods, along with the absence of any melanocytic features, are highly likely to point to a diagnosis of an angioma. One of the more simple lessons of dermoscopy.</p>
<p>Images property of South Tees NHS Foundation Trust.</p>
