A melanocytic nevus (also known as nevocytic nevus, nevus-cell nevus and commonly as a mole) is a type of melanocytic tumor that contains nevus cells. Some sources equate the term mole with "melanocytic nevus", but there are also sources that equate the term mole with any nevus form. The majority of moles appear during the first two decades of a person's life, with about one in every 100 babies being born with moles. Acquired moles are a form of benign neoplasm, while congenital moles, or congenital nevi, are considered a minor malformation or hamartoma and may be at a higher risk for melanoma. A mole can be either subdermal (under the<unk>  or a pigmented growth on the<unk> , formed mostly of a type of cell known as a melanocyte. The high concentration of the body's pigmenting agent, melanin, is responsible for their dark color. Moles are a member of the family of<unk>  lesions known as nevi and can occur in all mammalian species, but have been documented most extensively in humans, dogs, and horses.
symptom of Skin cancer
symptom of Psoriasis
symptom of Melanoma
symptom of Basal-cell carcinoma
symptoms of Keratoconus
symptom of Keratoconus
symptom of Herpes labialis
symptom of Alopecia areata