Underlying pathology of Nevus anemicus is:: (A) Autoimmune destruction of melanocytes, (B) Arrest of migration of melanocytes, (C) Abnormal vasoconstriction, (D) Defect in tyrosinase enzyme
Answer is C. Nevus anemicus presents as a localized area of skin blanching and hypopigmentation because of abnormal vasoconstriction due to increased sensitivity of blood vessels to catecholamines.