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This is a condition of defective desquamation of the filiform papillae.
black tongue, lingua villosa nigra.
Usually unknown but below are some of the causes-

Age: occurs at any age
Sex: No gender predilection is seen but seen mostly in males than in females.
Site: dorsal surface and the lateral surface of the tongue.

Elongated filiform papillae with mild hyperkeratosis and occasional inflammatory cells
Debris accumulation among the papillae and candida pseudohyphae may be seen.
Recommended to maintain a good oral hygiene, use of mouth wash, regular brushing




































Dysplasia defn- Characterized by loss of uniformity of individual cells and loss of their architectural orientation.
At cellular level- known as atypia
At tissue level-dsyplasia



References- Shafers book of oral pathology 9th edition
Essentials of Oral pathology-Purkait 3rd edition