title: Nail apparatus melanoma initially diagnosed as nail matrix blue nevus: a case report with dermatoscopy and dermatopathology.
abstract: We present a case of nail apparatus melanoma in a 50-year-old woman presenting as new and changing longitudinal melanonychia of the right thumb. Very heavy melanin pigmentation involving both the epidermis and dermis interfered with dermatopathological assessment, which initially leads to a diagnosis of nail matrix blue nevus. After consultation with a specialist multidisciplinary clinic the diagnosis was revised to invasive melanoma, a diagnosis consistent with the clinical and dermatoscopic assessment.
authors.affiliation: Department of Dermatology, Ankara University Faculty of Medicine, Ankara, Turkey.
authors.forename: Bengu Nisa
authors.initials: BN
authors.lastname: Akay
authors.affiliation: Department of Pathology, Ankara University Faculty of Medicine, Ankara, Turkey.
authors.forename: Aylin Okcu
authors.initials: AO
authors.lastname: Heper
authors.affiliation: Dermatology and Dermatopathology Centre, Hospitalier Lyon Sud, Pierre Bénite, France.
authors.forename: Luc
authors.initials: L
authors.lastname: Thomas
authors.affiliation: Dermatology and Dermatopathology Centre, Hospitalier Lyon Sud, Pierre Bénite, France.
authors.forename: Brigitte
authors.initials: B
authors.lastname: Balme
authors.affiliation: DHM Pathology, Macquarie Park, NSW, Australia; Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Simon
authors.initials: S
authors.lastname: Clark
authors.affiliation: Tehran University of Medical Sciences, Tehran, Iran; School of Medicine, The University of Queensland, Australia.
authors.forename: Cliff
authors.initials: C
authors.lastname: Rosendahl
keywords: blue nevus; dermatoscopy; melanoma; nail