start-ver=1.4
cd-journal=joma
no-vol=14
cd-vols=
no-issue=8
article-no=
start-page=e73170
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2026
dt-pub=202608
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Black Hairy Tongue in a 54�]Day�]Old Infant: A Case Report
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Black hairy tongue is a benign condition caused by elongation and defective desquamation of the filiform papillae, and it is uncommon in neonates and infants. We report a case in a 54-day-old girl who presented with a black lesion on the tongue dorsum. The lesion had first been noted at the 1-month medical checkup and persisted despite observation. At presentation, a localized blackish-brown lesion with accentuated filiform papillae was observed on the tongue dorsum and could not be wiped off with gauze. Oral candidiasis was considered in the differential diagnosis, but microbiological examination detected no Candida species. A clinical diagnosis of black hairy tongue was made, and the parents were instructed to gently clean the tongue dorsum with gauze and a sponge brush. The lesion resolved within 2?weeks without recurrence. Recognition of this benign entity may help avoid unnecessary treatment in infants.
en-copyright=
kn-copyright=

en-aut-name=MasuiMasanori
en-aut-sei=Masui
en-aut-mei=Masanori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=SakamotoYumi
en-aut-sei=Sakamoto
en-aut-mei=Yumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=KunisadaYuki
en-aut-sei=Kunisada
en-aut-mei=Yuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=IbaragiSoichiro
en-aut-sei=Ibaragi
en-aut-mei=Soichiro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

affil-num=1
en-affil=Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
kn-affil=

affil-num=2
en-affil=Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
kn-affil=

affil-num=3
en-affil=Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
kn-affil=

affil-num=4
en-affil=Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
kn-affil=
en-keyword=black hairy tongue
kn-keyword=black hairy tongue
en-keyword=case report
kn-keyword=case report
en-keyword=infant
kn-keyword=infant
en-keyword=oral hygiene
kn-keyword=oral hygiene
END