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Image Number 1148 (Becker's Naevus)


Diagnosis: Becker's Naevus

Site: Thigh

Sex: M

Age: 25


Description: Localized hyperpigmentation with hypertrichosis.

Submitted by: Nameer Al-Sudany

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Differential Diagnosis


Becker’s melanosis, also called Becker’s pigmented hairy nevus, occurs most commonly as a large, unilateral patch showing hyperpigmentation and hypertrichosis on the shoulder, back, or chest of an adult male. Usually, the patch is sharply but irregularly demarcated, but occasionally the lesion presents as coalescing macules instead of a solitary patch. The lesion commonly appears during the second decade of life. In some instances, Becker’s melanosis affects areas other than the shoulder and chest as in the present case.


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