lentigo maligna

lentigo /len·ti·go/ (len-ti´go) pl. lentig´ines   [L.] a flat brownish pigmented spot on the skin, due to increased deposition of melanin and an increased number of melanocytes.

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lentigo malig´na  a circumscribed macular patch of hyperpigmentation, with shades of dark brown, tan, or black, that enlarges slowly and may be a precursor to lentigo maligna melanoma.

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lentigo maligna.

See Hutchinson's freckle.

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lentigo [len-ti´go] (L.)

a flat, brownish pigmented spot on the skin due to increased deposition of melanin and an increased number of melanocytes; a freckle. (See Atlas 2, Part O.)

lentigo malig´na (malignant lentigo) see lentigo maligna melanoma.

senile lentigo (lentigo seni´lis,) (solar lentigo) a small smooth round brownish patch appearing on the face, neck, or back of the hands of many older people, caused by an increase in pigment; these are entirely harmless. Although these spots are associated with aging, it is not age that is the principal cause but many years of exposure to sun and wind. Called also liver spot.

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lentigo maligna

Hutchinson's melanotic freckle, lentigo maligna melanoma
A lesion comprising 10% of melanomas, affects those > age 60; flat, indolent, arises in premalignant freckle, located on sun-exposed aging skin; begins as an unevenly pigmented macule with an irregular border, slowly extends peripherally Etiology Solar overexposure,¹⁄₃ progress to melanoma in 10-15 yrs Prognosis > 95% 5-yr survival. See Lentigo, Melanoma.