Hyperpigmented Macules and Patches on the Face: Exogenous Ochronosis or Lichen Planus Pigmentosus? - Next Steps in Dermatology
JDD authors Deepika Narayanan, MD and Stephen K. Tyring, MD, PhD, MBA present a case of a patient with a 10-year history of blue-black macules and patches on the face and an associated history of skin...