Differential Diagnosis of Schizotypal Personality Disorder

Schizoid and Avoidant Personality Disorder. Schizoid and avoidant patients will not display the oddities of behavior, perception, and communication of schizotypal patients. B. Schizophrenia. No formal thought disorder is present in personality disorders. When psychosis is present in schizotypal patients, it is of brief duration. C. Paranoid Personality Disorder. Patients with paranoid personality disorder will not display the oddities of behavior, perception and communication of schizotypal...

Differential Diagnosis of Avoidant Personality Disorder

Social Phobia, Generalized Type shares many features of avoidant personality disorder. Patients may meet criteria for both disorders. The two disorders may only be differentiated by a life-long pattern of avoidance seen in patients with avoidant personality disorder. B. Dependent Personality Disorder patients are also hypersensitive to criticism and crave acceptance, but they will risk humiliation and rejection in order to get their dependent needs met. Patients may meet the criteria for...

Differential Diagnosis of Specific Phobia

Substance-Induced Anxiety Disorder. Substances such as caffeine, amphetamines, and cocaine can mimic phobic symptoms. Alcohol or benzodiazepine withdrawal can also mimic phobic symptoms. B. Panic Disorder, Obsessive-Compulsive Disorder, Social Phobia, Hypochondriasis or Anorexia Nervosa. Many psychiatric disorders present with marked anxiety, and the diagnosis of specific phobia should be made only if the anxiety is unrelated to another disorder. For example, specific phobia should not be...

Differential Diagnosis of Dysthymic Disorder

Dysthymia leads to chronic less severe depressive symptoms compared to Major Depression which usually has one of more discrete episodes. B. Substance-Induced Mood Disorder. Alcohol, benzodiazepines and other sedative-hypnotics can mimic dysthymia symptoms, as can chronic use of amphetamines or cocaine. Anabolic steroids, oral contraceptives, methyldopa, beta adrenergic blockers and isotretinoin (Accutane) have also been linked to depressive symptoms. Rule out with...

Differential Diagnosis of Post Traumatic Stress Disorder

Depression is also associated with insomnia, anhedonia, poor concentration, and feelings of detachment. A stressful event may be associated with the onset of depression. Depression is not commonly associated with nightmares or flashbacks of a traumatic event. B. Obsessive-Compulsive Disorder. OCD is associated with recurrent intrusive ideas. However, these ideas lack a relationship to a specific traumatic event, and they are not usually recollections of past events. C. Malingering. PTSD may...

Differential Diagnosis of Obsessive Compulsive Disorder

Substance-Induced Anxiety Disorder or Anxiety Disorder Due to a Medical Condition. Amphetamines, cocaine, caffeine and other symptomatic agents may mimic some of the anxiety symptoms associated with OCD. On rare occasions a brain tumor or temporal lobe epilepsy can manifest with OCD symptoms. B. Major Depressive Disorder. Major depression may be associated with severe obsessive ruminations (eg, obsessive rumination about finances or a relationship). These obsessive thoughts are usually not...