Naevi: congenital and acquired
Serious disorders not to be missed
Pigmented squamous cell carcinoma
Pigmented basal cell carcinoma
Common melanocytic naevi:
Establish the history of the lesion and associated features. Family history, especially of melanoma. Determine history of past residential (geographic) areas, sun exposure, history of sunburn and the practice of preventive measures.
Systematic examination of the skin especially searching for melanoma
Starting at the head, examine the hairline, backs of the ears, neck, back and backs of the arms. Pull down the underwear to expose the buttocks, examine the backs of the legs and feet. Then examine the front of the body including the anterior surfaces of the legs
Apply the ABCDE system to a suspicious lesion: Asymmetry, Border, Colour, Diameter, Evolution and/or Elevation
Most pigmented lesions are benign but one-third of all melanomas arise in pre-existing naevi, many of which are dysplastic.
Melanoma is extremely rare before puberty.