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Friday 21 March 2008

Eccentric hyperpigmented nevus

A 27-year-old woman consulted for pigmented lesion on her back. The lesion had a darker area on the upper right quadrant.

Dermoscopy revealed a central globular pattern and a peripheral atypical reticular pattern with branched streaks.

Atypical reticular pattern
(rectangle) and branched streaks (circle).

The lesion was excised and pathology revealed a compound nevus.

Atypical nevi with eccentric hyperpigmentation are atypical nevi of the utmost importance, the main differentiel diagnoses being melanomas in situ or early invasive melanomas.