A 28-year-old patient consulted for this pigmented lesion on his right forearm.

Dermoscopy revealed:

• multiple patches of pigmentation
• without background pigmentation

Clinical and dermoscopic examination were in favor of an agminated nevus.

Differential diagnosis is nevus spilus: this one includes a tan background patch which is not present in agminated nevus.

A 28-year-old woman consulted for this lesion on her right arm.

 Clinical picture

Dermoscopic picture

Dermoscopy revealed a targetoid lesion:

• a central globular pattern (black arrow) in favor of a melanocytic nevus
• a peripheral ecchymotic halo (red arrow)
• a central hemorrhagic crust (yellow arrow)

This lesion was a hemosiderotic targetoid nevus.

Regression

A 48-year-old woman presented this pigmented lesion on her back. 

 1: clinical picture

 2: dermoscopic picture

3: dermoscopic picture

  4:  dermoscopic picture

Dermoscopy revealed:

• regression areas with some depigmentation (green arrows and ovoid area)
• blue gray structures (blue arrows) and blue gray dots (peppering)
• linear irregular vessels (black arrows)

Lesion was excised and pathology revealed a regressive superficial spreading melanoma with Breslow index at  0,39 mm