Which patient groups have the highest prevalence of lentigo maligna melanoma?

Updated: Dec 19, 2019
  • Author: Winston W Tan, MD, FACP; Chief Editor: William D James, MD  more...
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The incidence of lentigo maligna is greatest in Hawaii, intermediate in the central and southern states, and lowest in the northern states. The incidence of melanoma is highest in Australia, where lentigo maligna accounts for 10-15% of all melanomas. [8]  A study in an Australian population estimated that the annual incidence of all lentigo maligna was 12.2 per 100,000 population, and that lentigo maligna occurred twice as frequently as other types of melanoma in situ. [9]

Patients with lentigo maligna tend to be older than those with superficial spreading malignant melanoma or nodular melanoma. Generally, patients with lentigo maligna are older than 40 years, with a mean age of 65 years. The peak incidence occurs in the seventh to eighth decades of life.

Lentigo maligna and lentigo maligna melanoma are associated with higher occupational exposure and lower recreational sun exposure.

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