• Transient tic disorder (TTD) has not generally been considered part of the spectrum of Tourette's syndrome (TS). We studied a large kindred affected by TS and identified two family members with TTD who are very likely obligate carriers of the TS gene. Our observations indicate that TTD is a possible expression of the TS gene and that individuals with TTD may transmit TS to their offspring.
Kurlan R, Behr J, Medved L, Como P. Transient Tic Disorder and the Spectrum of Tourette's Syndrome. Arch Neurol. 1988;45(11):1200–1201. doi:10.1001/archneur.1988.00520350038012
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