title: Wolf-Hirschhorn Syndrome with Epibulbar Dermoid: An Unusual Association in a Patient with 4p Deletion and Functional Xp Disomy.
abstract: Wolf-Hirschhorn syndrome (WHS) is a contiguous gene and multiple malformation syndrome that results from a deletion in the 4p16.3 region. We describe here a 6-month-old girl that presented with WHS features but also displayed unusual findings, such as epibulbar dermoid in the left eye, ear tags, and left microtia. Although on G-banding her karyotype appeared to be normal, chromosomal microarray analysis revealed an ∼13-Mb 4p16.3p15.33 deletion and an ∼9-Mb Xp22.33p22.31 duplication, resulting from a balanced maternal t(X;4)(p22.31;p15.33) translocation. The patient presented with functional Xp disomy due to an unbalanced X-autosome translocation, a rare cytogenetic finding in females with unbalanced rearrangements. Sequencing of both chromosome breakpoints detected no gene disruption. To the best of our knowledge, this is the first patient described in the literature with WHS and epibulbar dermoid, a typical characteristic of the oculoauriculovertebral spectrum (OAVS). Our data suggest that possible candidate genes for OAVS may have been deleted along with the WHS critical region.
authors.affiliation: Department of Morphology and Genetics, Universidade Federal de São Paulo, São Paulo, Brazil.
authors.forename: Silvia
authors.initials: S
authors.lastname: Bragagnolo
authors.forename: Mileny E S
authors.initials: ME
authors.lastname: Colovati
authors.forename: Roberta S
authors.initials: RS
authors.lastname: Guilherme
authors.forename: Anelisa G
authors.initials: AG
authors.lastname: Dantas
authors.forename: Malú Zamariolli
authors.initials: MZ
authors.lastname: de Souza
authors.forename: Maria F
authors.initials: MF
authors.lastname: de Soares
authors.forename: Maria I
authors.initials: MI
authors.lastname: Melaragno
authors.forename: Ana B
authors.initials: AB
authors.lastname: Perez
mesh_terms: D000328:Adult; D002648:Child; D002871:Chromosome Banding; D056905:Chromosome Breakpoints; D002872:Chromosome Deletion; D058674:Chromosome Duplication / Q000235:genetics*; D002894:Chromosomes, Human, Pair 4 / Q000235:genetics*; D041321:Chromosomes, Human, X / Q000235:genetics*; D003884:Dermoid Cyst / Q000235:genetics*; D005260:Female; D006801:Humans; D007223:Infant; D008423:Maternal Age; D014178:Translocation, Genetic / Q000235:genetics*; D054877:Wolf-Hirschhorn Syndrome / Q000235:genetics*