Structureless areas

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Description In this chapter we describe the dermoscopy term structureless areas and their histopathological correlation including regular blotches, irregular blotches
Author(s) Ralph P. Braun · Katrin Kerl · Oriol Yélamos
Responsible author Ralph Braun→ send e-mail
Status unknown
Status update August 1, 2019
Status by Ralph P. Braun


In this chapter we describe the dermoscopy term structureless areas and their histopathological correlation including regular blotches, irregular blotches

It has the following subchapters:

Irregular hyperpigmented structureless areas (irregular blotch)Ralph P. Braun, Katrin Kerl, Oriol Yélamos
Hypopigmented structureless areasRalph P. Braun, Katrin Kerl, Oriol Yélamos


Areas within a lesion that are devoid of any network or other structures, such as globules or regression structures (i.e., scars, peppering, granularity, or blue-white veil over flat areas), are called “structureless areas”. Their size should be at least 10% of the lesions's total surface area. Structureless areas can be hypopigmented, hyperpigmented or regularly pigmented.