The solar lentigo (SL) (plural lentigines) is a small, pigmented flat or slightly raise is a brown macule or patch that is induced by sun exposure.
Both solar lentigines and freckles are pigmented macules occurring in response to sun exposure. However, significant differences exist. Solar lentigines are larger in size but fewer in number compared to freckles. Solar lentigines increase in number with age whereas freckles decrease. Freckles occur in fair-skinned and red-haired individuals whereas solar lentigines occur in all races.
A relatively uniformly-colored tan or brown macule or patch is seen on the sun-exposed areas of the skin. It is most common on the cheeks and back of the hands.
Melasma and a solar lentigo seen on the left cheek.
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