Coated Tongue
A clinical finding in which the dorsal tongue surface is covered by a white or yellowish-white deposit resulting from accumulation of desquamated epithelial cells, bacteria, and food debris among elongated filiform papillae.
Full Definition
Coated tongue (lingua villosa) is a common benign finding rather than a discrete disease, often associated with poor oral hygiene, mouth breathing, antibiotic use, or febrile illness. The coating must be distinguished from white lesions that cannot be wiped off, such as leukoplakia, and from the black discolouration seen in black hairy tongue. Editors should note that 'furred tongue' and 'coated tongue' are used interchangeably in British texts, while 'furred tongue' may be considered slightly colloquial in formal writing. The condition is not a potentially malignant disorder.
Usage
Usage note: 'Furred tongue' is acceptable in British clinical usage but 'coated tongue' is the more formal preference. Neither should be used as a synonym for hairy tongue or hairy leukoplakia.
In Context
- "A coated tongue was noted on examination, attributable to the patient's prolonged antibiotic course." — Oral medicine inpatient consultation
- "'Furred tongue' may be retained if it appears in a patient-facing document, but 'coated tongue' is preferred in clinical records." — Style guidance for patient information leaflets