Case 5 Male, 9 years. Recurrent (after 3 years) plaque of dorsum of footShow diagnosis & comments
(Recurrent) sclerosing blue naevus
At low power there is a resemblance to Spitz naevus, but the slender and sometimes dendritic cells, the production of pigment at all levels of the lesion and the lack of clustering of cells in superficial parts argue in favour of blue naevus. There is some diffuse sclerosis.
Local recurrence of blue naevi often becomes manifest after years rather than weeks to months (as is the case in most recurrent banal naevi).
Harvell JD, White WL. Persistent and recurrent blue nevi. Am J Dermatopathol. 1999; 21: 506-17.