Although the appearance of black hairy tongue is quite characteristic, asin the case described, whenever the objective examination is not so clear or there is not an aspect of lingual hairiness it is important to establish the differential diagnosis, especially with some pathologies that can be associated with dark pigmentation of the tongue, such as the pseudo-black hairy tongue caused by bismuth subsalicylate, melanoma, oral melanoacantoma, smoker's melanosis (melanocytic pigmentation), Addison's disease, hemochromatosis, acanthosis nigricans, Peutz- Jeghers syndrome, Laugier-Hunziker syndrome, as well as metals deposition if the clinical history is suggestive of this possibility [3,6,8]
The second third was the best but otherwise just okay
Very well done
Different CNTC factories, often aligned with provincial tobacco monopolies, compete for market share, profitability, and prestige through their branded portfolios