Answers are grounded in this paper and cite their sources.
A giant congenital nevocytic nevus (CNN) on the trunk was followed in a patient from age three months to 23-years-old. During that time the nevus underwent pigmentary regression leaving 2-3 mm lentigines without any evidence of vitiligo or halo formation around the giant CNN. Histopathologically, nevus cells remained in the dermis.
No takes yet. Share an insight, caveat, or question.
Zack et al. (1988) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: