What are the physical exam findings of agminated lentiginosis?

Updated: Feb 23, 2021
  • Author: Robert A Schwartz, MD, MPH; Chief Editor: William D James, MD  more...
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Agminated (segmental, unilateral, partial unilateral) lentiginosis is characterized by numerous lentigines confined to a body segment, with a sharp demarcation at the midline. The distribution frequently corresponds to one or more dermatomes. Less commonly, the lesions can be distributed unilaterally, bilaterally, in a checkerboard pattern, or in midline clusters. Usually, the disease appears in early childhood, although the lentigines may also be noted at birth. These lesions have been associated with numerous diseases. Clinically, the lesions appear as circumscribed, tan or dark brown macules on healthy background skin.

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