Papilloma (syn. fibroepithelial polyp) is a benign tumor histogenetically associated with the epidermis, can occur at any age, but more often in older people.
Dermoid cyst is a developmental defect. It exists from birth or appears in the first years of life, can be located anywhere, but most often on the face, especially periorbitally, in the nose area, on the scalp and neck.
Epidermal cyst (syn. infundibular cyst) is a developmental defect. It is a slowly growing, dermo-hypodermal nodular formation localized on the scalp, face, neck and trunk.
Epidermal nevus is a benign developmental defect, which, as a rule, has a dysembryogenetic origin. Three forms of nevus are known: localized, inflammatory, systemic. All of them appear at birth or in early childhood.
Malignant melanoma of the skin (syn.: melanoblastoma, melanocarcinoma, melanosarcoma) is a highly malignant tumor, consisting of atypical melanocytes. A genetic predisposition to the development of melanoma has been noted - at least 10% of all cases of melanoma are familial
Precancerous limited melanosis of Dubreuil (syn. lentigo maligna Hutchinson) is a disease that belongs to the group of precancerous conditions. The classic manifestation of Dubreuil's melanosis in areas exposed to insolation (on the face, especially often in the zygomatic region) is characterized by spots with irregular polycyclic outlines.
Nevus of Ota is a skin hyperpigmentation area, continuous or with small inclusions, from blue-black to dark brown, with a characteristic localization on the face in the innervation zone of the trigeminal nerve. It can be bilateral.
Blue nevus (syn.: blue nevus of Jadassohn). There are common and cellular blue nevi. They are benign intradermal melanocytic tumors with characteristic clinical and morphological manifestations. The blue-black color is due to the optical effect and is associated with the deep location of melanin in the dermis.
Spitz nevus (syn.: spindle cell and/or elyteloid cell nevus, juvenile melanoma) is an unusual nevoid melanocytic neoplasm that has clinical and morphological similarities with malignant melanoma of the skin.
Dysplastic nevi (syn. Clark's nevi) are a variant of acquired melanocytic nevi, which are characterized by an increased risk of malignancy due to the preservation of the proliferative activity of immature melanocytes in the epidermis and cell atypia of varying degrees of severity.
