Skin - Melanocytic tumor
Other melanocytic lesions
Solar lentigo

Author: Christopher Hale, M.D. (see Authors page)

Revised: 22 February 2017, last major update April 2013

Copyright: (c) 2002-2017, PathologyOutlines.com, Inc.

PubMed Search: Solar lentigo

Cite this page: Solar lentigo. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/skintumormelanocyticsolarlentigo.html. Accessed May 25th, 2017.
Definition / general
Terminology
  • Also called solar lentigines, age spots
Epidemiology
  • Sun exposed skin of elderly (90% of whites age 60+); also truck drivers on sun exposed face (J Dermatol 2008;35:146)
  • Multiple large solar lentigos on upper back and shoulders suggest prior severe sunburn, a risk factor for melanoma (Dermatology 2007;214:25)
  • PUVA (psoralen + ultraviolet A) treatment for psoriasis cause numerous solar lentigines with atypia; similar findings after severe radiation exposure (Arch Dermatol 1997;133:209)
Clinical features
  • Macular hyperpigmentation
  • Often > 1 cm
  • "Ink spot lentigo" variant: small, darkly pigmented, stellate
Treatment
Dermoscopy
  • Sharply demarcated border and fingerprint like structures
Clinical images

Images hosted on other servers:

Back lesions

Various images

Pre and post laser treatment

Microscopic (histologic) description
  • Elongation of rete ridges and increased pigmentation at tips of retes; pigmentation may be irregular
  • Also solar elastosis, telangiectasia, variable chronic inflammatory infiltrate in dermis
Differential diagnosis