Description: This is an ignoble name for a lesion. The dorsal surface of the tongue appears hairy and is discolored. The hairy texture is imparted by excessive kerantinization of the filiform papillae. The keratin may take on the color of extrinsic stains and display a variety of colors. To the artistic minded, the more glorious cases rival the rainbow.
Etiology: The exact etiology is unknown, however, it appears to occur more frequently among heavy smokers. Another suggested cause is fungal overgrowth precipitated by antibiotics. In some patients, such as the case illustrated, there is no apparent cause.
Treatment: Treatment consists of brushing the tongue with a soft bristle toothbrush. If there is an obvious cause, naturally, it should be eliminated.
Prognosis: Good
Differential diagnosis: None .