Fissures and ridges

From dermoscopedia

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 Authored by: Ralph P. Braun     ·  Katrin Kerl

 Keywords:   fissure · ridge · seborrheic keratosis
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Author(s) Ralph P. Braun · Katrin Kerl
Owner Ralph Braun→ send e-mail
Status released
Status update May 29, 2017
Status by Ralph P. Braun
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Fissures (invaginations or sulci) are commonly seen in seborrheic keratosisThis glossary term has not yet been described. and may also be seen in melanocyticThis glossary term has not yet been described. neviThis glossary term has not yet been described. with congenital pattern. In essence, fissures are linear grooves in the epidermis and, like comedo-like openings[[Comedo like openings]], correspond to surface invaginations. A pattern that resembles “brain-like appearancelines, curved and thick to describe the pattern and fissures and ridges (former synonyms “gyry and sulci” and “fat fingers”) to describe the structural components of the pattern SK” or cerebriform appearance is created, with the grooves resembling “sulci” and the intervening ridges resembling surface “gyri”. Fissures correspond histopathologically to wedgeshaped, keratin-filled invaginations of the epidermis.

Milia like cysts comedo like openings schematic new.jpg