title: An Adult Case of Chromosome 22q11.2 Deletion Syndrome Associated with a High-positioned Right Aortic Arch.
abstract: Chromosome 22q11.2 deletion syndrome (22q11.2 DS) has a very wide phenotypic spectrum that includes dysmorphic features, cardiac anomalies, and hypocalcemia arising from hypoparathyroidism. We herein describe an adult case of 22q11.2 DS with associated hypoparathyroidism and anomalies of the aortic arch. Because the patient had been diagnosed with primary hypoparathyroidism at another hospital, a diagnosis of 22q11.2 DS had been overlooked. A chest X-ray examination revealed widening of the mediastinum caused by a high-positioned right aortic arch, and we subsequently confirmed a diagnosis of 22q11.2 DS using fluorescence in situ hybridization. Because primary hypoparathyroidism is a rare disorder, physicians should be aware of the variable phenotypic features of 22q11.2 DS.
authors.affiliation: Department of Internal Medicine, Keiaido Hospital, Japan.
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Hoshino
authors.forename: Moriya
authors.initials: M
authors.lastname: Machida
authors.forename: Shun-Ichi
authors.initials: SI
authors.lastname: Shimano
authors.forename: Teizo
authors.initials: T
authors.lastname: Taya
mesh_terms: D001013:Aorta, Thoracic / Q000002:abnormalities*; D004062:DiGeorge Syndrome / Q000150:complications* / Q000235:genetics; D006801:Humans; D007011:Hypoparathyroidism / Q000150:complications* / Q000235:genetics; D017404:In Situ Hybridization, Fluorescence; D008297:Male; D008482:Mediastinum / Q000000981:diagnostic imaging; D008875:Middle Aged; D035583:Rare Diseases