| • | (after onset, several days or weeks of progression) |  
 | • | asymptomatic and self-limited with spontaneous resolution in 3 to 9 months |  
 | • | ddx: linear LP, ILVEN, verruca plana, nevius unis lateris |  
 | • | seen primarily along Baschko’s lines |  
 | • | Histology:  not diagnostic; biopsy most useful in excluding other lesions |  
  
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