Seborrheic keratosis

From dermoscopedia academy

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 Editor: Ralph P. Braun

 Author(s): Lauren Fried
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Description Below are dermoscopic features commonly associated with the diagnosis “Seborrheic keratosis”. The example images have been approved by a panel of experts as representative of each given feature.


For a more in-depth discussion of associated features, please see the Dermoscopedia page for “Seborrheic keratosis”.

Author(s) Lauren Fried
Responsible author Ralph Braun→ send e-mail
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Status update This page has not yet been assessed.
Status by Ralph P. Braun


Below are dermoscopic features commonly associated with the diagnosis “Seborrheic keratosis”. The example images have been approved by a panel of experts as representative of each given feature.

For a more in-depth discussion of associated features, please see the Dermoscopedia page for “Seborrheic keratosis”.

Milia-like cysts[edit]

White-to-yellow, round structures that appear very bright when contrasted with their dark brown or black surroundings. Easier to visualize with non-polarized dermoscopy than with polarized dermoscopy.[1]

Comedo-like openings[edit]

Round to ovoid craters that have black or brown comedo like plugs.[2]

Moth-eaten (sharply demarcated) borders[edit]

Presence of a sharply demarcated and irregularly curved border; portions of the border are often scalloped, giving a moth-eaten appearance.[3]

“Fissures and ridges” / gyri and sulci / cerebriform pattern[edit]

Fissures (sulci) are linear comedo-like openings; they appear dark brown to black. Multiple fissures (sulci) and ridges (gyri) may produce a cerebriform pattern, where the structures resemble sulci and gyri of the brain.[4]

Fat-fingers[edit]

Linear and wide dermoscopic structures corresponding to ridges. Often short and sausage-shaped.[5]

Fingerprint-like structures[edit]

Fine parallel running lines of light brown to dark brown colors that resemble the dermatoglyphics of a human fingerprint.[6]

Hairpin (looped) vessels, usually with whitish halo[edit]

Hairpin vessels can appear as perfect “U”-shaped vessels, or can appear as “U”-shaped vessels that are twisted upon themselves.[7]