DermNet provides Google Translate, a free machine translation service. Note that this may not provide an exact translation in all languages

Annular granular pattern dermoscopy

Author: Naomi Ashman, Dermoscopist, Torbay Skin, Auckland, New Zealand; DermNet New Zealand Editor in Chief Adjunct A/Prof Amanda Oakley, Dermatologist, Hamilton, New Zealand. Created December 2018.


What is an annular granular pattern?

An annular granular pattern consists of grey or brown dots (granular) around follicular openings (annular) and is regarded as a characteristic of lentigo maligna. In descriptive terminology, it is known as 'grey dots arranged around follicular openings' [1].

What does an annular granular pattern look like through the dermatoscope?

Through the dermatoscope, an annular granular pattern is seen as:

  • Dots and structureless areas arranged around follicle openings (and involving adnexal openings)
  • Gray dots and circles on the face.

In which lesions is an annular granular pattern seen in through the dermatoscope?

Through the dermatoscope, an annular granular pattern may be seen in the following lesions:

  • Lentigo maligna
  • Pigmented actinic keratosis
  • Lichen planus-like keratosis.

In lichen planus-like keratosis, grey dots around the follicular openings tend to be coarse, regular and widespread, whereas in lentigo maligna they are much finer and focal.

What is the histological explanation of an annular granular pattern?

Histologically, slate grey dots are due to melanin in melanophages.

See smartphone apps to check your skin.
[Sponsored content]

 

Related information

 

References

  1. Kittler H, Rosendahl C, Cameron A, Tschandi P. Dermatoscopy, Pattern analysis of pigmented and non-pigmented lesions; 2nd edition. Facultas Verlags- und Buchandels AG facultas Universitatsverlag, Vienna, Austria. 2016.

 On Dermnet

Books about skin diseases