<prompt> Nevus achromicus and Nevus anemicus can be differentiated by:Hypopigmented lesionsImmunofluroscenceDiascopyHuctchinsons sign  <response>: Lesions in Nevus depigmentosus will not increase in size as the borders does not merge into surrounding skin on Diascopy. Pressing with a glass slideWhereas borders get merged and there will be increase in size in Nevus anemicus, on Diascopy. 