Regression.

A 21-year-man consulted for this lesion on his arm

Dermoscopy revealed:

• a whitish - pinkish structureless area
• with gray dots

in favor of a regressive lesion.

Pathology was in favor of a fully regressive melanocytic lesion. A fully regressive melanoma cannot be ruled out. 

Nasal pigmented lesion

A 85-year-old woman consulted for a pigmented lesion on the tip of her nose.

Dermoscopy revealed:

• a pseudo-pigmented network (due to the facial localisation)
• asymmetric pigmentation of the follicular openings
• slate gray dots disposed as annular- granular structures

Clinical and dermoscopic features were in favor of a lentigo maligna melanoma which was confirmed by a punch biopsy.

Lentigo maligna melanoma

A 70-year-old woman consulted for this light-brown pigmented lesion on her left cervical area.

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
  

The other possible features of lentigo maligna melanoma are:

• asymmetric pigmented follicular openings
• dark rhomboïdal structures
• homogeneous areas

Other cases:1 2 3 4 5