Figure 1 from The Bull's eye Tongue: A Case of Extensive Physiological Pigmentation of the Tongue Semantic Scholar A Case Report of Black Hairy Tongue (Melanotrichia Linguae or Lingua Pilosa Nigra) Cureus Differential Diagnosis of Pigmented Lesions in the Oral Mucosa: A Clinical Based Overview and Narrative Review 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? Tongue Discoloration New England Journal of Medicine