The various clinical subtypes are:
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Cluster A: Paranoid, Schizoid, schizotypal
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Cluster B: Histrionic , narcissistic, antisocial, borderline
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Cluster C: Avoidant, dependent, anankastic
The prevalence of personality disorders is 10-20% and onset is generally in adolescence or early adulthood.
Diagnosis:
Diagnosis is made on the basis of marked disturbance in attitude and behaviors involving several areas of functioning.
Treatment:
Mostly includes psychotherapy and occasional use of pharmacotherapy when required.