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  • Title: Melanonychia following mohs surgery for recurrent squamous cell carcinoma in situ of the nail bed.
    Author: Lipoff JB, Scope A, Busam KJ, Nehal KS.
    Journal: J Cutan Med Surg; 2008; 12(4):194-7. PubMed ID: 18627701.
    Abstract:
    BACKGROUND: Longitudinal melanonychia (LM) is characterized by the appearance of a longitudinal pigmented band in the nail plate. Melanonychia can occur from many causes, including racial predisposition, trauma, drugs, pregnancy, Addison disease, Peutz-Jeghers syndrome, Laugier-Hunziker syndrome, Bowen disease, onychomycosis, benign nail matrix nevi, and melanoma. OBJECTIVE: We present a case of diffuse melanonychia developing several months following Mohs surgery for a human papillomavirus-induced recurrent squamous cell carcinoma in situ of the nail bed. CONCLUSIONS: This case illustrates the diagnostic dilemma in determining the etiology of the melanonychia and considers the differential diagnosis.
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