Fig. 1

Hematoxylin and eosin staining reveals the salient morphological features of analyzed nevi. a Compound nevus infiltrating between adnexal structures (magnification ×4). b, c, e Superficial melanocytic elements transitioning into a deep melanocytic component (magnification ×10). d Enlarged superficial melanocytes with cytological atypia. f Deeper, smaller monotonous melanocytes (magnification ×20)