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Keratotic Horn on Left Fifth Fingertip: Congenital Ectopic Nail Misdiagnosed as a Common Wart


Address correspondence to Sara Poggiali, M.D., Ph.D., Dipartimento di Medicina Clinica e Scienze Immunologiche, Sezione di Dermatologia, Università Degli Studi di Siena, Policlinico, Le Scotte, 53100 Siena, Italy, or e-mail:,


Abstract:  The term “ectopic nail” refers to nail tissue found in a location other than in the normal nail bed. Here we report a 9-year-old girl with an asymptomatic keratotic “horn” on the tip of her left fifth finger. Present since the age of 1 month, it was misdiagnosed as a common wart and treated using liquid nitrogen cryotherapy without benefit.

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