title: Subtelomeric deletion of 12p: Description of a third case and review.
abstract: Only 12 cases with a cytogenetically visible deletion of the short arm of chromosome 12 (12p) have been reported so far. The difference in clinical features observed in these patients indicates that there is no distinct phenotype associated with this short arm deletion, although the existence of a del(12p) syndrome was previously suggested. Besides those 12 reports, only two patients have been described with a subtelomeric 12p deletion; both present in the same family in which the son showed a mild phenotype of moderate mental retardation and behavioral problems and his carrier mother had no apparent phenotype. In this article, we describe the third known patient with a subtelomeric 12p deletion in a young boy with mental retardation and microcephaly, and review the literature.
authors.affiliation: Estudio Colaborativo Español de Malformaciones Congénitas, Centro de Investigación sobre Anomalías Congénitas, Instituto de Salud Carlos III, Ministerio de Sanidad y Consumo, Madrid, Spain. alex.mac14@gmail.com
authors.forename: A H
authors.initials: AH
authors.lastname: Macdonald
authors.forename: L
authors.initials: L
authors.lastname: Rodríguez
authors.forename: I
authors.initials: I
authors.lastname: Aceña
authors.forename: M L
authors.initials: ML
authors.lastname: Martínez-Fernández
authors.forename: D
authors.initials: D
authors.lastname: Sánchez-Izquierdo
authors.forename: E
authors.initials: E
authors.lastname: Zuazo
authors.forename: M L
authors.initials: ML
authors.lastname: Martínez-Frías
mesh_terms: D002648:Child; D002872:Chromosome Deletion; D002881:Chromosomes, Human, Pair 12 / Q000235:genetics*; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D008831:Microcephaly / Q000235:genetics*; D013577:Syndrome; D016615:Telomere / Q000235:genetics*