Dermoscopy revealed slate-gray dots disposed in an annular-granular pattern in favor of a lentigo maligna melanoma which was confirmed by biopsies performed on the lesion.
This case of lentigo maligna melanoma (LMM) exhibited only a feature of annular-granular pattern.
Annular-granular structures can be seen in:
- lichen planus-like keratosis
- actinic keratosis
- asymmetric pigmented follicular openings
- dark rhomboïdal structures
- homogeneous areas