著者

元島 民郎

出版者

日本ハンセン病学会

雑誌

レプラ

巻号頁・発行日

vol.24, no.5, pp.337-341, 1955

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6 cases of lingua nigra in lepromatous patients were observed since March, 1954. 4 of them were male and the rest female, the age ranging from 24-52.<br>In every case, the dorsal surface of the tongue was black or dark gray, suggesting of the wet rat skin. The patients tasted astringent, but severe pain was not complained. The upper half area of papillae filiformes was found minutely keratinized. The lesion spread from the anterior part of papillae circumvallatae to the whole dorsal surface of the tongue, and was smaller nearer to the lip and disappeared, leaving intact one or two thirds of the tongue tip area. No pain was complained when this hairy body was pulled by a pincette, but the loss of taste sense was recognized.<br>Blood, urine and bacterial examinations and syphilitic reactions revealed no distinct findings. Treatments of rinsing with 2% boracic acid, 0.2% acriflavin solution, application of caustic silver and curettage produced favorable effects upon all cases from 1 to 4 weeks.<br>This lingua nigra appeared after extraction of teeth or after treatment of the teeth duct of the lower jaw.<br>We will try to carry out clinical experiments and investigate the mechanisms.