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12 December 2017 : Case report  Mexico

Phenotypic Variation in Patients with Homozygous c.1678G>T Mutation in EVC Gene: Report of Two Mexican Families with Ellis-van Creveld Syndrome

Rare disease

Marisol Ibarra-Ramirez1ABCDEF*, Luis Daniel Campos-Acevedo1ABC, Jose Lugo-Trampe1BF, Laura E. Martínez-Garza1AEF, Víctor Martinez-Glez23CD, María Valencia-Benitez34CD, Pablo Lapunzina23CD, Víctor Ruiz-Peréz34CDEF

DOI: 10.12659/AJCR.905976

Am J Case Rep 2017; 18:1325-1329

Abstract

BACKGROUND: Ellis-van Creveld syndrome is an autosomal recessive chondro-ectodermal dysplasia characterized by disproportionate short stature, limb shortening, narrow chest, postaxial polydactyly and dysplastic nails and teeth. In addition, 60% of cases present congenital heart defects. Ellis-van Creveld syndrome is predominantly caused by mutations in the EVC or EVC2 (4p16) genes, with only a few cases caused by mutations in WDR35. 

CASE REPORT: Here, we report on two Mexican families with patients diagnosed with Ellis-van Creveld syndrome. Family 1 includes four patients: three females of 15, 18, and 23 years of age and a 7-year old male. Family 2 has only one affected newborn male. All patients exhibited multiple features including hypodontia, dysplastic teeth, extra frenula, mild short stature, distal limb shortening, postaxial polydactyly of hands and feet, nail dystrophy, and knee joint abnormalities. Only two patients had an atrial septal defect. In all cases, molecular analysis by Sanger sequencing identified the same homozygous mutation in exon 12 of EVC, c.1678G>T, which leads to a premature stop codon. 

CONCLUSIONS: The mutation c.1678G>T has been previously reported in another Mexican patient and it appears to be a recurrent mutation in Mexico which could represent a founder mutation. The large number of patients in this case allows the clinical variability and spectrum of manifestations present in individuals with Ellis-van Creveld syndrome even if they carry the same homozygous mutation in a same family.

Keywords: Ellis-Van Creveld Syndrome, Genes, Recessive, Rare Diseases

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American Journal of Case Reports eISSN: 1941-5923
American Journal of Case Reports eISSN: 1941-5923