Phenotypic modifications of patients with full chromosome aneuploidies and concurrent suspected or confirmed second diagnoses. (25th April 2015)

• Record Type: Journal Article
• Authors: Zarate, Yuri A.; Bosanko, Katherine A.; Bhoj, Elizabeth; Ganetzky, Rebecca; Starr, Lois J.; Zackai, Elaine H.; Schaefer, G. Bradley
• Is Part Of: American journal of medical genetics. Volume 167:Number 9(2015:Sep.)
• Page Start: 2168
• Page End: 2175
• Publication Date: 2015-04-25
• Subjects: Medical genetics -- Periodicals; 616.14205
• DOI: 10.1002/ajmg.a.37126
• Languages: English
• ISSNs: 1552-4825

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="ajmga37126-sec-0001" sec-type="section"> <p>The coexistence of two or more distinct genetic conditions is known to be a rare phenomenon. Full chromosome aneuploidies can be associated with a broad variety of cytogenetic abnormalities or single gene disorders resulting in phenotypic modifications that confuse the diagnostic process. We present six patients with primary aneuploidies and a suspected or confirmed secondary genetic diagnosis or unusual birth defect. Among the cases included, we report the first patients with concurrent Down syndrome in combination with Prader‐Willi, Craniofacial Microsomia, and Stickler syndromes. We also describe only the second reported case of a neonate with Down syndrome and Marfan syndrome. In all cases, the unusual clinical presentations lead to further molecular cytogenetic studies as well as single or multi‐gene molecular evaluations. We make emphasis on the importance of entertaining the possibility of coexistent diagnoses when the phenotype is not what is expected for aneuploidies rather than attributing the unusual findings to rare or unreported associations of the primary aneuploidy. © 2015 Wiley Periodicals, Inc.</p> </sec> </abstract>