This is the second case of the week. This patient was referred as a 2-week wait with an irregular black lesion on top of the right shoulder with an uncertain history. What is your first clinical impression, and then what do you see dermoscopically?
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.
Once we examine dermoscopically the shape of the lesion is irrelevant, the terms symmetry and asymmetry refer to the structures. Here we see a pigment network that is essentially monomorphic ie has a very similar appearance throughout with good overall symmetry (no biological structures are ever perfectly symmetrical).
The diagnosis is consistent with a harmless ink-spot lentigo.
Images copied with kind permission from South Tees Hospitals NHS Foundation Trust.
