Final answer:
Geographic tongue is a condition characterized by a map-like effect on the tongue with unusual zones of filiform papillae. It is usually harmless and does not require treatment.
Step-by-step explanation:
A map-like effect on the tongue, with unusual zones of filiform papillae, is known as geographic tongue or benign migratory glossitis.
This condition is characterized by patches on the tongue that appear red, pink, white, or pale, giving the tongue a map-like or geographic appearance.
Geographic tongue is usually harmless and does not require treatment. However, it may cause slight discomfort or sensitivity in some individuals.
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