26 December 2020
: Case report 
A Case of Lingua Villosa Nigra (Black Hairy Tongue) in a 3-Month-Old Infant
Mistake in diagnosis, Unusual or unexpected effect of treatment, Diagnostic / therapeutic accidents, Unexpected drug reaction, Rare disease, Educational Purpose (only if useful for a systematic review or synthesis)
Joanna E. Owczarek-Drabińska1ABCEF*, Małgorzata Radwan-Oczko1CEGDOI: 10.12659/AJCR.926362
Am J Case Rep 2020; 21:e926362
Figure 2. The tongue after 4 weeks of treatment.