Full article: Melanosis of the Tongue Olanzapine Induced Black Hairy Tongue During Treatment of Hebephrenic Schizophrenia Decompensation: A Rare Case Report and Brief Review of the Literature Cureus A Case Report of Black Hairy Tongue (Melanotrichia Linguae or Lingua Pilosa Nigra) Cureus Tongue Discoloration New England Journal of Medicine A 9 year old boy presented for evaluation of dark spots on the tongue. The family first noted these spots 5 months prior and reported that they remained stable. Can you make a diagnosis? Differential Diagnosis of Pigmented Lesions in the Oral Mucosa: A Clinical Based Overview and Narrative Review