1. ¹Division of General Pediatrics, Department of Pediatrics, University of Virginia Health System, Charlottesville, VA, USA
2. ²Division of Neonatology, Department of Pediatrics, University of Virginia Health System, Charlottesville, VA, USA
3. ³Division of Endocrinology, Department of Pediatrics, University of Virginia Health System, Charlottesville, VA, USA

Correspondence: Dr WL Clarke, Division of Endocrinology, Department of Pediatrics, University of Virginia Health System, PO Box 800386, Charlottesville, VA 22908-0386, USA. E-mail: wlc@virginia.edu

Received 18 September 2006; Revised 3 February 2007; Accepted 9 February 2007.

Abstract

Thyroid dysfunction is recognized in the newborns of mothers affected by Graves' disease during pregnancy. We describe the development of concurrent hyperthyroidism and hypothyroidism in the twin infants of a mother with Graves' disease diagnosed during pregnancy.