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Five things to know about melanoma

May 13, 2019

"Five things to know about ... melanoma" in CMAJ (Canadian Medical Association Journal) provides a brief overview of this malignant skin cancer for physicians and patients.
  • Sun exposure is an important factor in the development of melanoma, so it often appears on the face, neck, arms and torso, where sun exposure is common.
  • Melanoma can also occur on areas with minimal sun exposure, such as palms and soles of the feet.
  • A specific mitogen-activated pathway is linked to mutations causing melanoma and genomic sequencing is helping identify markers for diagnosis and treatment.
  • About 10% of melanomas are challenging to diagnose as they may be pink, red, clear or normal skin-coloured.
  • Patients with any suspicious skin lesions should be referred to dermatology. Coloured lesions with any of the ABCDE criteria -- Asymmetric shape, irregular Border, Colour variation, Diameter greater than 6 mm (about the size of a pencil eraser) and Evolution (change) -- should be considered suspicious.
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