A benign mole with some irregular features (asymmetry, border irregularity, color variation) that mimic melanoma, also known as a dysplastic nevus.
A large, unilateral, hyperpigmented patch with irregular borders that later develops coarse, dark hairs (hypertrichosis).
A benign mole that appears as a small, well-defined, blue-black, dome-shaped papule due to deep dermal pigment.
A well-demarcated, uniformly light brown, flat patch of skin, whose presence in multiples is a key feature of neurofibromatosis type 1.
A benign mole that is present at birth, often larger and more raised than acquired nevi, and may have coarse hairs.
A mature, benign mole that is raised, dome-shaped, flesh-colored or light brown, and soft.
A benign mole that is flat (macular), small, round, and uniformly brown, with melanocyte nests at the dermal-epidermal junction.
A vascular tumor that presents as distinctive violaceous or brown patches, plaques, or nodules.
A benign, dark brown or black, well-defined macule, such as a solar lentigo ('age spot') on sun-exposed skin.
A form of melanoma in situ on sun-damaged skin, appearing as a slowly enlarging, irregularly pigmented brown-to-black macule.
A malignant tumor of melanocytes, classically presenting as an asymmetric, irregularly bordered, variably colored, and evolving pigmented lesion (ABCDE criteria).
The earliest stage of melanoma, where malignant melanocytes are confined to the epidermis, such as in lentigo maligna.
A dermal melanocytosis affecting the shoulder and supraclavicular area, presenting as a mottled, blue-gray patch.
A dermal melanocytosis presenting as a mottled, blue-gray patch of unilateral hyperpigmentation on the face in the distribution of the trigeminal nerve.
A distinctive lesion consisting of a light brown café-au-lait macule with multiple, smaller, darker brown macules or papules speckled within it.
A 'blackhead,' which is a pilosebaceous follicle filled with a keratin and sebum plug that is open to the skin surface, with the black color caused by oxidized lipid.
A subtype of BCC that contains melanin, appearing as a pearly, translucent papule with brown, blue, or gray pigmentation.
A benign, waxy, hyperpigmented, 'stuck-on' papule or plaque with a verrucous surface.
