Acquired lesion on an ankle.

A 26-year-old man consulted for an acquired lesion for 4 years which was slowly enlarging on his right ankle.

 Clinical picture.

 Dermoscopic picture without pressure.

Dermoscopic picture with pressure.

This regular lesion has:

• regular dotted vessels
• a retiform depigmentation, or reticular depigmentation  

Clinical and dermoscopic patterns were in favor of a Spitz nevus.

Pathology confirmed this diagnosis.

A 41-year-old woman was examined for this lesion on her right thigh.

Dermoscopy revealed:

• a multicomponent pattern
• a reticular depigmentation  
• chrysalis-like structures
• polymorphous vessels including corkscrew vessels

Pathology revealed a superficial spreading melanoma with a Breslow index at 0.54mm