Age and Anatomical Location-Related Dermoscopic Patterns of 210 Acral Melanocytic Nevi in a Turkish Population

Dermoscopy is a useful tool for earlier diagnosis and differentiating benign lesions from melanoma.

We aim to investigate dermoscopic features of acral nevi, age, and localisation-related findings of these lesions.

This was an observational, descriptive study. Patients were retrospectively collected from the Department of Dermatology. The patients with acral nevi were included in the study. Inclusion criteria were Turkish nationality and the presence of at least 1 acral nevus diagnosed both clinically and dermoscopically. Lesions in dorsal and subungual areas were excluded. All nevi were examined by the same dermatologist.

The most common dermoscopic patterns were as follows: parallel furrow (87 patients; 41.4%), globular (24 patients; 11.4%), fibrillar (22 patients; 10.5%), combination patterns (19 patients; 9.1%), globulostreak-like (16 patients; 7.6%), lattice-like (15 patients; 7.1%), homogeneous (12 patients; 5.7%), nontypical (8 patients; 3.8%), parallel ridge (4 patients; 1.9%), reticular (2 patients; 1.0%), and crista dotted pattern (1 patient; 0.5%). The parallel furrow pattern was the most common pattern in all localisations. The number of parallel furrow patterns (5 lesions) was equal to the globulostreak-like pattern (5 lesions) on the thenar area. The number of parallel furrow patterns (4 lesions) was equal to the fibrillar pattern (4 lesions) on the heel. Parallel furrow (dotted variants) (11 lesions) and globulostreak-like patterns (5 lesions) were the most common patterns in the pediatric population (0-15 years old). The fibrillar pattern showed a tendency for soles (12 lesions), while a lattice-like pattern was seen more often in the plantar arch (3 lesions).

Description of the dermoscopic features of acral nevi is important to improve management and reduce the number of unnecessary excisions. The most common patterns were parallel furrow, globular, and fibrillar in our study. Parallel furrow (dotted variants) and globulostreak-like patterns were the most common patterns in the pediatric population. The fibrillar pattern showed a tendency for soles, while a lattice-like pattern was seen more often on the plantar arch. Therefore, there may be a relation between anatomic localisation, age, and dermoscopic pattern.