[Tonsural trichotillomania].

Tonsure trichotillomania is a subtype of trichotillomania in which the scalp exhibits a tonsural pattern of alopecia over the crown, extending to the frontal margin and sparing the lateral margins and the nape of the neck. It differs from the more common form of childhood trichotillomania in that predominantly female adolescents are affected and its incidence is related to quite severely pathologic psychodynamics, often with a disturbed relationship to female sexuality. The treating physician should be more guarded in assessing the prognosis; hair plucking often continues for years. Two patients with tonsure alopecia, associated in one case with trichotillomania of the pubic hair and in the other with enuresis, are presented.