Lattice-like pattern

A 14-year-old girl consulted for this small plantar nevus.

Dermoscopy revealed a typical lattice-like pattern which is a subtype of parallel furrow pattern in favour of a benign acral plantar nevus.

Other cases of acral nevi:

1  2  3  4  5  6  7  8  9  10  11  

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  

Lattice-like pattern

A 17-year-old girl consulted for an acral melanocytic lesion on her left toe.



Dermoscopy revealed a lattice-like pattern in favor of a benign acral melanocytic nevus.

Lattice-like pattern is a subtype of parallel furrow pattern.
It is more often localized on arch areas at the difference of fibrillar pattern which is observed more frequently on pressure areas.

On this figure above, the lattice-like pattern corresponds to the longitudinal and transversal thicker lines and the white circles symbolize eccrine pores.

Other cases of acral nevi:

1  2  3  4  5  6  7  8  9  10  11