Abstract
Trichotillomania (TTM) is a chronic behavioral disorder characterized by the irresistible urge to pull out one's hair, resulting in noticeable hair loss.1 Clinically, TTM is classified as an impulse-control disorder and believed to belong to the obsessive-compulsive (OCD) spectrum. Tourette's Syndrome (TS), also belonging to the OCD spectrum, was recently associated with mutations in the slit and trk like 1 (SLITRK1) gene.2 Abelson et al.2 identified a frameshift mutation and a 3'-UTR micro-RNA binding site variation in three independent TS families. The mother of one proband carried the SLITRK1 mutation and was diagnosed with TTM. Therefore, we hypothesized that sequence variation in SLITRK1 may also contribute to TTM not associated with TS.
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