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Review
. 2020 Jan-Feb;42(1):87-104.
doi: 10.1590/1516-4446-2019-0471.

Trichotillomania is more related to Tourette disorder than to obsessive-compulsive disorder

Hugues Lamothe  1   2   3 , Jean-Marc Baleyte  1   2   3   4 , Luc Mallet  3   5   6   7 , Antoine Pelissolo  2   3   5
Affiliations
Review

Trichotillomania is more related to Tourette disorder than to obsessive-compulsive disorder

Hugues Lamothe et al. Braz J Psychiatry. 2020 Jan-Feb.

Abstract

Objective: Trichotillomania (TTM) is characterized by the pulling out of one's hair. TTM was classified as an impulse control disorder in DSM-IV, but is now classified in the obsessive-compulsive related disorders section of DSM-5. Classification for TTM remains an open question, especially considering its impact on treatment of the disorder. In this review, we questioned the relation of TTM to tic disorder and obsessive-compulsive disorder (OCD).

Method: We reviewed relevant MEDLINE-indexed articles on clinical, neuropsychological, neurobiological, and therapeutic aspects of trichotillomania, OCD, and tic disorders.

Results: Our review found a closer relationship between TTM and tic disorder from neurobiological (especially imaging) and therapeutic standpoints.

Conclusion: We sought to challenge the DSM-5 classification of TTM and to compare TTM with both OCD and tic disorder. Some discrepancies between TTM and tic disorders notwithstanding, several arguments are in favor of a closer relationship between these two disorders than between TTM and OCD, especially when considering implications for therapy. This consideration is essential for patients.

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Conflict of interest statement

The authors report no conflicts of interest.

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