Intradermal melanocytic nevus
Nevus cells (melanocytes) are normally localized in the basal layer of the epidermis. Their proliferation may appear in the epidermis (jonctional nevus), in the epidermis and dermis (compound nevus) or only in the dermis (intradermal nevus).
Intradermal melanocytic nevus - a benign tumor in which the tumor cells form nests in the dermis, are regular, round, with central nucleus and single nucleolus. In the supreficial dermis, some melanocytes may produce melanin pigment in the cytoplasm (dark-brown, granular). (H&E, ob.x4)
Intradermal melanocytic nevus (detail)
Intradermal melanocytic nevus (detail). (Hematoxilina-eozina, ob. x10)