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A mole can be either subdermal (under the skin) or a pigmented growth on the skin, 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 skin lesions known as nevi (singular "nevus"), occurring commonly in ...
This skin lesion is quite common in the population, and it can present at birth, known as a congenital meloncytic nevus, or later in life as an acquired nevus. Should the nevi appear in toddler- or school-aged children, they are more likely to remain present throughout the rest of that person's life. [ 4 ]
The Skin Cancer Foundation reports that only 20 to 30% of melanomas start as existing moles. That means that 70 to 80% develop on skin that appeared to be normal. “Be familiar with the ...
Various differential diagnoses of pigmented skin lesions, by relative rates upon biopsy and malignancy potential, including "melanoma" at right. Looking at or visually inspecting the area in question is the most common method of suspecting a melanoma. [68] Moles that are irregular in color or shape are typically treated as candidates.
Various differential diagnoses of pigmented skin lesions, including dysplastic nevus, showing the relative incidence of biopsied lesions, and malignancy potential. When an atypical mole has been identified, a skin biopsy takes place in order to best diagnose it. Local anesthetic is used to numb the area, then the mole is biopsied.
In dermatology, a mole map is a medical record which records an image and the location of lesions and/or moles, or dark spots on the human body.Such a record is useful for diagnosis of cancer a priori or as a baseline which can be compared against later images to determine when there has been a visual change which may indicate cancer.
The congenital melanocytic nevus is a type of melanocytic nevus (or mole) found in infants at birth. This type of birthmark occurs in an estimated 1% of infants worldwide; it is located in the area of the head and neck 15% of the time.
Alfred Blaschko, a private practice dermatologist from Berlin, first described and drew the patterns of the lines of Blaschko in 1901. He obtained his data by studying over 140 patients with various nevoid and acquired skin diseases and transposed the visible patterns the diseases followed onto dolls and statues, then compiled the patterns onto a composite schematic of the human body.