Regular hyperpigmented structureless areas (regular blotch)

From dermoscopedia

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Description In this chapter we describe the histopathological correlation of regular hyperpigmented structureless areas (regular blotch)
Author(s) Ralph P. Braun · Katrin Kerl · Oriol Yélamos
Responsible author Ralph Braun→ send e-mail
Status released
Status update July 2, 2019
Status by Ralph P. Braun


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Peripheral reticuler central hyperpigmentation schematic.jpg

Regular blotches are defined as those that display symmetry, regular borders,homogenous dark hue, and are located within the center of the lesion. A pigment network often surrounds a regular blotch. Regular blotches are associated with nevi.

Regular blotch.jpg

Regular blotches can be seen in “activated” nevi and are attributed to heavy melanin concentrations in the stratum corneum. Because the pigment is concentrated in the stratum corneum, it can easily be stripped off using a tape-stripping procedure, thereby revealing underlying structures.



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