Disorders of Psychiatric Etiology
Classification of Disorders of Psychiatric Etiology
• Dysmorphic syndrome
• Delusions of parasitosis
• Compulsive habits
• Neurotic excoriations
• Trichotillomania
• Factitious syndromes
• Cutaneous signs of injecting drug use
Figure 24-1. Delusions of parasitosis (A) Usually patients collect small pieces of debris from their skin by scratching with their nails or an instrument and submit them to the doctor for examination for parasites. In this case, pointed tweezers were used and the results are ulcers, crusted lesions, and scars. (B) Occasionally, this can progress to an aggressive behavior such as depicted in this case where the patient posed to demonstrate how she collects the “parasites” from her skin on a piece of paper. In the majority of cases, patients are not dissuaded from their monosymptomatic delusion.