Hi,
A lentigo is a small pigmented macule surrounded by normal-appearing skin. These may evolve slowly over years, or they may be eruptive and appear rather suddenly. Pigmentation may vary, with a color ranging from brown to black. Depending on the type of lentigo present, a solitary lesion or multiple lesions that can occur anywhere on the body. The most common benign lentigo are the lentigo simplex and the solar lentigo. This link may be helpful: http://emedicine.medscape.com/article/1068503-overview
I hope this helps. Take care and best regards.
