[Etiologic considerations on pigmentations in the oral facial region].
D003937:Diagnosis, Differential; D005148:Facial Dermatoses / Q000209:etiology*; D006801:Humans; D009912:Oral Manifestations; D010859:Pigmentation Disorders / Q000175:diagnosis / Q000209:etiology*
Consideraciones etiologicas sobre las pigmentaciones en la region oro-facial.