Total melanonychia of 20 nails as a rare manifestation of vitamin B12 deficiency
Klinger S. Faico-Filho, MD,
Renata S. Martins, MD,
Carolina L. Santos, MD,
Wagner A. Poles, MD,
Renan B. de Mello, MD,
Marina M. Moura-Faico, PhD
Affiliations
Klinger S. Faico-Filho, MD
Department of Medicine, Universidade Ferderal de São Paulo, São Paulo, Brazil; Correspondence to: Klinger S. Faico-Filho, MD, St Napoleão de Barros, 627, Vila Clementino, São Paulo–SP, Brazil.
Renata S. Martins, MD
Department of Medicine, Universidade Ferderal de São Paulo, São Paulo, Brazil
Carolina L. Santos, MD
Department of Medicine, Universidade Ferderal de São Paulo, São Paulo, Brazil
Wagner A. Poles, MD
Department of Medicine, Universidade Ferderal de São Paulo, São Paulo, Brazil
Renan B. de Mello, MD
Division of Dermatology, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
Marina M. Moura-Faico, PhD
Department of Medicine, Centro Universitário de Caratinga, Caratinga, Brazil