What are the Tourette syndrome (TS) Study Group diagnostic criteria for transient tic disorder (D-1 and D-2)?

Updated: May 30, 2019
  • Author: William C Robertson, Jr, MD; Chief Editor: Stephen L Nelson, Jr, MD, PhD, FAACPDM, FAAN, FAAP  more...
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Diagnostic criteria for transient tic disorder (D-1 and D-2) are as follows:

  • This disorder is characterized by single or multiple motor and/or vocal tics

  • The tics occur many times a day, nearly every day, for at least 2 weeks, but for no longer than 12 consecutive months, although the disorder began over 1 year ago

  • The anatomic location, number, frequency, complexity, or severity of tics changes over time

  • The patient has no history of TS or chronic motor or vocal tic disorders

  • Tics have their onset before age 21 years

  • Motor and/or vocal tics must be witnessed by a reliable examiner directly at some point in the illness or be recorded by videotape or cinematography (definite transient tic disorder, D-1) or (for tics not witnessed by a reliable examiner) tics must be witnessed by a reliable family member or close friend, and description of tics as demonstrated must be accepted by a reliable examiner (for transient tic disorder by history, D-2)

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