#hypopigmentation  unusual lack of skin color
  exclusion:  #hyperpigmentation
  supertype:  #physiological_state__physiologicalstate__physiological_condition__physiologicalcondition  the condition of the body or bodily functions
  part of:  #leukoderma  #vitiligo
  subtype:  #albinism  the congenital absence of pigmentation in the eyes and skin and hair

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