Child neurology: Andersen-Tawil syndrome.

Andersen-Tawil syndrome (ATS) is one of the periodic paralyses. This autosomal dominant disorder was initially named after Andersen, who in 1971 reported the case of a young boy presenting with intermittent muscle weakness, ventricular arrhythmias, and other developmental abnormalities. It was subsequently renamed Andersen-Tawil syndrome following the additional work of Dr. Rabi Tawil. Periodic paralysis, cardiac arrhythmias, and dysmorphic features are now recognized as the 3 characteristic features in patients with ATS.