Fissured tongue is a benign condition characterized by deep grooves (fissures) in dorsum of tongue. This condition is harmless and no medical intervention is required. Fissure (Latin fissura, Plural fissurae) is a groove, natural division, deep furrow, or cleft found in the brain, spinal cord, and liver; or a tear in the anus. ... Many animals have longer and more flexible tongues than humans. ...
Fissured tongue is seen in Melkersson-Rosenthal syndrome and in most patients with Down syndrome. Melkersson-Rosenthal syndrome is a rare neurological disorder characterized by recurring facial paralysis, swelling of the face and lips (usually the upper lip), and the development of folds and furrows in the tongue. ...
Background: Fissuredtongue is a condition frequently seen in the general population that is characterized by grooves that vary in depth and are noted along the dorsal and lateral aspects of the tongue.
Fissuredtongue is also seen in Melkersson-Rosenthal syndrome and Down syndrome and in frequent association with benign migratory glossitis (geographic tongue).
Melkersson-Rosenthal syndrome is a rare condition consisting of a triad of persistent or recurring lip or facial swelling, intermittent seventh (facial) nerve paralysis (Bell palsy), and a fissuredtongue.
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