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Tuesday 9 September 2008

Acral melanocytic nevus

A 48-year-old woman consulted for this pigmented lesion on her 5th right finger present since early childhood. 

Dermoscopy revealed a parallel furrow pattern and in some areas a lattice-like pattern.

The dermoscopic features were in favor of a benign acral nevus.
A regular yearly follow-up was planned.

In parallel furrow pattern, the pigmentation follows the sulci at the difference of parallel ridge pattern where the pigmentation follows the cristae.

In Acral melanocytic nevi, 3 types of patterns can be observed:
  • parallel furrow pattern
  • lattice-like pattern
  • fibrillar pattern
Parallel ridge pattern are typical of acral melanomas but can be observed in other cases:
  • milk-line nevus
  • subcorneal hemorrhages (talon noir)
Other cases of acral nevi:
1  2  3  4  5  6  7  8  9  10  11