Isolated areas of darkening skin


  • Pigmentary demarcation lines_0912 Derm Clinic 1

A man, aged 28 years, came to the clinic complaining of skin darkening on his arms. Although he reported that this color change might have been present for a long time, his wife commented that it became more noticeable while on their recent honeymoon in the Caribbean.

Employed as an informaticist at a local medical center, the patient was not routinely spending extended lengths of time in the sun. The man had no significant medical history, and the only medication he took was ibuprofen on an as-needed basis following sporadic workouts.

HOW TO TAKE THE POST-TEST: This Clinical Advisor CME activity consists of 3 articles. To obtain credit, you must also read Erythematous scaling lesions and Enlarging annular plaques and patches; the post-test will include questions related to all three articles.To obtain CME/CE credit, please click here after reading the articles to take the post-test on

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