RESUMEN
To our knowledge, a derivative chromosome 17 formed by a subtelomeric translocation involving chromosomes 17 and 14 has not been reported before. Here, we present the clinical and molecular cytogenetic characteristics of 2 family members with a subtelomeric rearrangement involving chromosome regions 14q32.32q32.33 and 17p13.3. The patients had moderate intellectual disability, a high forehead, a broad nasal root, downslanting palpebral fissures, epicanthal folds, retrognathia, hypertelorism, wrinkled skin over the glabella and metopic suture, and mild finger clubbing. Array CGH detected a 2.52-Mb duplication of 14q32.32q32.33 (103,805,680-106,396,479) and a 1.2-Mb deletion of 17p13.3 (87,009-1,298,869) confirmed to be pathogenic by quantitative PCR and loss of heterozygosity analysis of 17p13.3. The derivative chromosome 17 was inherited from a parental balanced translocation. To our knowledge, this cytogenetic aberration has not been described previously. The refinement of the genetic location will improve the knowledge of the genes responsible for this phenotype.