Harlequin nail

Matsuura, Hiroki; Fujihara, M; Tanaka, Hiroyuki; Anzai, Yoshiaki; Kashino, T; Kuninaga, Naoki

doi:10.1093/qjmed/hcy247

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2021

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“…Fingernails grow approximately 3 millimeters per month. The harlequin nail enables the clinician to calculate when a patient has abruptly stopped smoking, often due to a severe illness such as a stroke [ 6 - 8 ]. Our patient, a 54-year-old Asian man, had approximately 3 millimeters of normal-appearing nail distal to the proximal nail fold; assuming at least 1 millimeter of normal nail beneath his proximal nail fold, this would total 4 millimeters and corresponds to his smoking cessation about one and a half months earlier.…”

Section: Discussionmentioning

confidence: 99%