![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiG17punBZXql4zuEXXPXVlfEnCUDKxPbUB7x3nnWiWDu8nIMGbpaCqxbJPYukGXMccnm7-zkLrS3YJ-RJhlVSF6-bPR_3s5C9WNVLURlaShZEM-GzWKm7a0VCKopf46iw4teFxM7sCZzk/s400/DSKS1.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgHznu-LN9xKqgwtMVfb7jtxz9dl1LzQePna5DALFQHZNUp9BFKiOe3ZMEBtvMfValksTrNKV4BCfJ1hI2rdJYOjw_bfVVz7FF-udt7UNogKdqAOdW2vr4eQ8-eBkIZtfB-J7fsW1quevg/s400/DSKS2.jpg)
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
- keratoacanthomas
- basal cell carcinomas
- melanomas (often thick and irregular)