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Image Number 580 (Congenital hairy nevus)

 
Morphology:
Plaque

Diagnosis: Congenital hairy nevus

Site: Face

Sex: F

Age: 12

Type: Clinical

Description: Congenital nevomelanocytic nevus of the forehead with a pebbled surface and thick terminal hairs.

Submitted by: Shahbaz Janjua

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Differential Diagnosis

History:
This adolescent girl presented with a large dark brown plaque involving most of the forehead, 
and the frontal scalp since birth.   The pebbly surfaced plaque was covered with thick terminal hairs.  
Congenital hairy nevi , also known as congenital nevomelanocytic nevi, are usually noted at birth or 
soon thereafter. Only 5% of the lesions are multiple but the location  and size of  a congenital hairy 
nevus may be variable.  There is a significant potential for large congenital hairy nevi to become 
malignant.     
 


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