Frank Rutsch and Raoul C.M. Hennekam contributed equally to this study.
Article first published online: 15 JAN 2013
Copyright © 2013 Wiley Periodicals, Inc.
American Journal of Medical Genetics Part A
Volume 161, Issue 2, pages 360–370, February 2013
How to Cite
Feigenbaum, A., Müller, C., Yale, C., Kleinheinz, J., Jezewski, P., Kehl, H. G., MacDougall, M., Rutsch, F. and Hennekam, R. C.M. (2013), Singleton–Merten syndrome: An autosomal dominant disorder with variable expression. Am. J. Med. Genet., 161: 360–370. doi: 10.1002/ajmg.a.35732
How to Cite this Article: Feigenbaum A, Müller C, Yale C, Kleinheinz J, Jezewski P, Kehl HG, MacDougall M, Rutsch F, Hennekam RCM. 2013. Singleton–Merten syndrome: An autosomal dominant disorder with variable expression. Am J Med Genet Part A 161A:360–370.
- Issue published online: 24 JAN 2013
- Article first published online: 15 JAN 2013
- Manuscript Accepted: 14 SEP 2012
- Manuscript Received: 26 JUN 2012
- Singleton–Merten syndrome;
- aortic calcification;
- dental abnormalities;
- short dental roots;
- autosomal dominant
In 1973, Singleton and Merten described two females with abnormal dentition, unique radiographic changes especially of the hands, and severe calcification and intimal weakening of the aortic arch and valve. Since then three additional cases with similar features have been reported and the diagnosis was suggested in another three individuals. We present an update of one case and the detailed clinical phenotype of six other cases with Singleton–Merten syndrome. The occurrence of the disorder in six members of two families and vertical male-to-male transmission indicate an autosomal dominant pattern of inheritance. Variability in phenotype, also within a single family, is significant. Core manifestations are marked aortic calcification, dental anomalies (delayed eruption and immature root formation of primarily the anterior permanent teeth, and early loss of permanent teeth due to short roots, acute root resorption, high caries, and aggressive alveolar bone loss), osteopenia and acro-osteolysis, and to a lesser extend also glaucoma, psoriasis, muscle weakness, and joint laxity. Additional clinical characteristics described here include particular facial characteristics (high anterior hairline, broad forehead, smooth philtrum, thin upper vermillion) and abnormal joint and muscle ligaments. The cause and pathogenesis of this syndrome remain unknown. © 2013 Wiley Periodicals, Inc.