Relative increase of Langerhans cells in 'banal' and dysplastic melanocytic naevi.

Langerhans cell counts were carried out in 16 normal or banal melanocytic naevi and 22 dysplastic naevi, and the numbers in the naevi compared with Langerhans cell numbers in perilesional, clinically normal, epidermis. Langerhans cell numbers were found to be raised in both types of naevi, but no significant difference between Langerhans cell numbers in the two types of naevi was found.