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Yang R, Duan Y, Kong Q, Li W, Xu J, Xia X, Sang H. What do we learn from dystrophic epidermolysis bullosa, nails only? Idiopathic nail dystrophy may harbor a COL7A1 mutation as the underlying cause. J Dermatol 2020; 47:782-786. [PMID: 32396230 DOI: 10.1111/1346-8138.15372] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 04/05/2020] [Indexed: 12/01/2022]
Abstract
Dystrophic epidermolysis bullosa (DEB) is a genodermatosis caused by mutations in the COL7A1 gene. DEB, nails only (DEB-na), is a rare type of DEB. Patients with DEB-na can be overlooked, and genetic testing is helpful to determine the correct diagnosis. We collected two families with DEB-na. Clinical information was analyzed. Ultrastructural analysis of the skin tissue was performed. Blood samples were obtained. Next-generation sequencing was performed and the results were confirmed by Sanger sequencing. A genetic study revealed two novel heterozygous mutations: COL7A1:c.6742G>A (p.G2248R) in patient 1 and c.7181C>G (p.P2394R) in patient 2. Precise diagnosis was made for every patient based on clinical findings and genetic studies. We summarized the phenotype and COL7A1 mutations related to DEB-na. We report a new phenotype of DEB-na and two novel mutations in COL7A1. In addition, we emphasize the importance of careful clinical examination and genetic testing in the diagnosis of DEB-na.
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Affiliation(s)
- Rui Yang
- Department of Dermatology, School of Medicine, Jinling Hospital, Nanjing University, Nanjing, China
| | - Yuanyuan Duan
- Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - Qingtao Kong
- Department of Dermatology, School of Medicine, Jinling Hospital, Nanjing University, Nanjing, China
| | - Weiwei Li
- Department of Reproduction and Genetics, Institute of Laboratory Medicine, School of Medicine, Jinling Hospital, Nanjing University, Nanjing, China
| | - Jie Xu
- Department of Dermatology, School of Medicine, Jinling Hospital, Nanjing University, Nanjing, China
| | - Xinyi Xia
- Department of Reproduction and Genetics, Institute of Laboratory Medicine, School of Medicine, Jinling Hospital, Nanjing University, Nanjing, China
| | - Hong Sang
- Department of Dermatology, School of Medicine, Jinling Hospital, Nanjing University, Nanjing, China
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27 TH Fondation René Touraine Annual SCIENTIFIC MEETING 2019: Skin Appendages - Developmental and Pathophysiological Aspects. Exp Dermatol 2019; 28:1353-1367. [PMID: 31854035 DOI: 10.1111/exd.14039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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