alexa [Aquagenic palmar keratoderma in a patient heterozygous for the mutation c.3197G>C in the CFTR gene].
Genetics & Molecular Biology

Genetics & Molecular Biology

Gene Technology

Author(s): Nadal M, Laudier B, Malinge MC, Binois R, Estve E

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Abstract BACKGROUND: Aquagenic palmar keratoderma is an entity recently described in the literature by English and McCollough in 1996. It is a rare condition affecting young women and is of unknown incidence. It causes a wrinkled and oedematous appearance in the skin of the hands that may be seen a few minutes after immersion in water. This condition may be associated with a heterozygous mutation in CFTR, the gene involved in cystic fibrosis. We report the first case of aquagenic keratoderma associated with a new mutation in the CFTR gene. PATIENTS AND METHODS: An 18-year-old patient with no particular history was referred for a painful rash on both palms occurring whenever she showered, and which had been ongoing for several months. The clinical examination was normal except for an appearance of moderate palmar hyperhidrosis. Following a test in which both hands were immersed in cold water for 5minutes, the patient presented itching, burning and pain localized to the hands. The palms were wrinkled and oedematous with white, translucent and confluent papules. A clinical diagnosis of aquagenic palmar keratoderma was made. Since this condition may be associated with mutations in the CFTR gene, a genetic study was performed for this patient and revealed the presence of a new mutation in the CFTR gene for cystic fibrosis in the heterozygous state inherited from her mother: c.3197G>C or p.Arg1066.Pro and a heterozygous polypyrimidic 5T variant inherited from her father. DISCUSSION: We report a new case of aquagenic palmar keratoderma in a patient heterozygous for a new mutation of the gene involved in cystic fibrosis. Several studies have shown association of aquagenic keratoderma with the CFTR gene for heterozygotes (carriers without cystic fibrosis), for patients with cystic fibrosis and for a patient presenting CFTRopathy with pancreatic insufficiency. Copyright © 2015 Elsevier Masson SAS. All rights reserved. This article was published in Ann Dermatol Venereol and referenced in Gene Technology

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