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Title: A novel mutation in CDMP1 causes brachydactyly type C with "angel-shaped phalanx". A genotype-phenotype correlation in the mutational spectrum
Author: Gutierrez-Amavizca, B.E.
Brambila-Tapia, A.J.L.
Juarez-Vazquez, C.I.
Holder-Espinasse, M.
Manouvrier-Hanu, S.
Escande, F.
Barros-Nunez, P.
Issue Date: 2012
Abstract: Brachydactyly type C (BDC), a well-recognized autosomal dominant hand malformation, displays brachymesophalangy of the second, third, and fifth fingers, a short first metacarpal, hyperphalangy, and ulnar deviation of the index finger. An "angel-shaped phalanx" is a distinctive radiological sign that can be found in BDC and other skeletal dysplasias, such as angel-shaped phalango-epiphyseal dysplasia (ASPED), an autosomal dominant skeletal abnormality characterized by a typical angel-shaped phalanx, brachydactyly, specific radiological findings, abnormal dentition, hip dysplasia, and delayed bone age. BDC and ASPED result from mutations in the CDMP1 gene. We report here a Mexican patient with BDC and clinical features of ASPED who carries a novel mutation in CDMP1, confirming that BDC and ASPED are part of the CDMP1 mutational spectrum. Based on the large number of clinical features in common, we suggest that both anomalies are part of the same clinical spectrum. Supported by an extensive review of the literature, a possible genotype-phenotype correlation in the mutational spectrum of this gene is proposed. � 2012 Elsevier Masson SAS.
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