Dermoscopy revealed fissures and ridges (black rectangle) and a vascular pattern with many hairpin blood vessels (red rectangle).
Hairpin blood vessels and fissures and ridges were in favor of a seborrheic keratosis.
Hairpin blood vessels are quite typical of seborrheic keratoses (particularly if there is a white halo surrounding them) but are non specific and can be found also in:
- melanocytic nevi
- basal cell carcinomas
- melanomas (often thick and irregular)