IV. Causes: Blue-Gray discoloration

  1. Silver (Argyria)
  2. Arsenic
  3. Alkaptonuria (Ochronosis)
  4. Gold (Chrysoderma)
  5. Amiodarone
  6. Minocycline-Induced Hyperpigmentation

V. Causes: Yellow discoloration

  1. Jaundice
  2. Carotenemia
  3. Medications (Quinacrine)
  4. Explosive manufacture (Dinitrophenol, Tetryl)

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