A case of agminated lentiginosis with multiple café-au-lait macules.

Agminated lentiginosis is an unusual pigmentary disorder, characterized by numerous lentigines grouped within an area of normal skin. The pigmented macules are often in a segmental distribution within a sharp demarcation at the midline. We encountered a 28-year-old woman with an unusual combination of multiple café-au-lait macules and diffuse numerous lentigines involving the right cheek and ipsilateral upper thorax with sharp demarcation at the midline. The multiple lentigines extended bilaterally over the back in a peppered distribution. There were 21 café-au-lait macules on both arms, and the trunk and buttocks; however, there were no Lisch nodules, neurofibromas, or any other clinical manifestations for neurofibromatosis. Histopathology of a macule revealed the features of lentigo.