How is lentigo maligna melanoma diagnosed?

Updated: Dec 19, 2019
  • Author: Winston W Tan, MD, FACP; Chief Editor: William D James, MD  more...
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Patients with low-risk melanomas, less than 1 mm thick, do not routinely need laboratory studies. Dermoscopy is the first step that is essential for diagnosis of this lesion. The use of a dermatoscope, by a dermatologist or other physician trained in its use, can be very helpful in distinguishing lentigo maligna from other types of skin lesion. However, the dermoscopic appearance of early lentigo maligna can be difficult to distinguish from that of other pigmented lesions, particularly on the face.

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