The Japanese Journal of Dermatology
Online ISSN : 1346-8146
Print ISSN : 0021-499X
ISSN-L : 0021-499X
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Volume 133, Issue 11
Displaying 1-7 of 7 articles from this issue
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Guidelines
Seminar for Medical Education
Original Articles
  • Analysis of Foot Dysfunction and Toe Deformities that May Cause Pincer Toenails
    Akiko Imai, Yuko Ito, Nobuhiko Ueda, Shingo Kanamori, Seiji Onai, Kaor ...
    2023 Volume 133 Issue 11 Pages 2589-2597
    Published: October 20, 2023
    Released on J-STAGE: October 20, 2023
    DOIhttps://doi.org/10.14924/dermatol.133.2589
    JOURNAL RESTRICTED ACCESS
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    Based on the hypothesis that foot dysfunction and toe deformity are the causes of pincer toenails, a study was conducted with 130 adults walking independently. Intended to reveal the relevance of pincer toenails to muscle strength of lower limbs, range of motion of ankle joint, hallux valgus, and deformity of the lesser toes, the study was carried out based on the classification of their pincer toenails by shape and location. The result, indicated that the pincer toenails of the great toe and the lesser toes were correlated with decreased dorsiflexion range of motion of ankle joint and that the pincer nails of the lesser toes were significantly correlated with the deformities of the lesser toes. In terms of shape classification, the correlations between trumpet-type pincer nails of the great toe and decreased muscle strength of the lower limbs and also between plicated-type pincer nails of the great toe and moderate or severe hallux valgus, as well as deformity of the lesser toes, were observed.

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Case Reports
  • A Case of Idiopathic Trachyonychia
    Yuhei Kawashima, Tomo Sakiyama, Keitaro Fukuda, Julia Miyamoto, Masata ...
    2023 Volume 133 Issue 11 Pages 2599-2605
    Published: October 20, 2023
    Released on J-STAGE: October 20, 2023
    DOIhttps://doi.org/10.14924/dermatol.133.2599
    JOURNAL RESTRICTED ACCESS
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    A 50-year-old female had suffered from rough nails and intense itch on all her digits for about two years. When she first visited us, numerous longitudinal ridges were observed on the nail surface, resulting in rough and lusterless nails. In addition, the skin of the proximal nail folds was reddish and swollen with severe itching. A biopsy taken from the nail matrix histologically showed spongiosis of the matrix epithelium. Together with the characteristic nail changes, this case was diagnosed with idiopathic trachyonychia. Topical corticosteroids using the occlusive dressing technique resulted in marked improvement of the nail symptoms. We would like to introduce the disease entity of trachyonychia, which is not well recognized in Japan, and demonstrate the evaluation and management strategies for treating it.

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