Psychiatric disorders in individuals with pervasive developmental disorder

Area of Science:

• Neuroscience
• Psychiatry
• Developmental Psychology

Background:

• Pervasive Developmental Disorders (PDD) encompass a spectrum of autistic disorders characterized by impairments in social interaction, communication, and imagination.
• Historically, autism prevalence was estimated at 2-4 per 10,000 children.
• Recent studies suggest higher prevalence (up to 90 per 10,000) with broader definitions, indicating a potential increase or improved recognition.

Purpose of the Study:

• To highlight the heterogeneity and potential underdiagnosis of PDD.
• To discuss the increased risk of comorbid psychiatric disorders in individuals with PDD.
• To inform clinicians about diagnostic challenges and implications.

Main Methods:

• Review of existing literature on PDD prevalence and associated conditions.
• Analysis of diagnostic criteria and their impact on prevalence estimates.
• Discussion of clinical observations regarding PDD manifestations and comorbidities.

Main Results:

• Autism spectrum disorder prevalence may be significantly underestimated, with figures up to 90 per 10,000 children.
• Individuals with PDD exhibit a higher incidence of psychiatric comorbidities like affective disorders, anxiety, psychosis, and Tourette's disorder.
• Mild or heterogeneous PDD symptoms, along with psychiatric comorbidities, can obscure diagnosis.

Conclusions:

• PDD is more prevalent than previously recognized, necessitating broader diagnostic awareness.
• The high rate of comorbid psychiatric disorders in PDD patients requires careful clinical attention.
• Improved recognition of PDD's diverse presentations and associated conditions is crucial for accurate diagnosis and treatment.