Preparation for Child Psych PRITE and Boards
Revision as of 19:49, 2 September 2015 by Eugene Grudnikoff MD (Talk | contribs) (Childhood-onset Schizophrenia)

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Introduction

In pre-schoolers, psychosis (particularly hallucinations) are most likely caused by stress or anxiety; these are transient and benign. In school-age children, psychotic symptoms may be more persistent, and are more likely to be associated with drug toxicity or significant mental illness (Lewis, p. 494)

Although rare in children, early-onset schizophrenia is a frequently tested item on the PRITE and boards.

Childhood-onset Schizophrenia

Most often COS is persistent, non-episodic illness with poor prognosis. DSM-5 criteria can be applied to children and adolescents. It's important to rule out affective disorders, substance-induced psychosis as well as autism and PDD.

Etiology and Prognostic factors

  • COS is rare with rates of 1 per 10,000 (schizophrenia as a whole is 1 per 100).
  • There is slight male predominance in COS
  • Patients whose disease is of acute onset (25%), with productive schizophrenic manifestations such as hallucinations and delusions (positive manifestations), have a better prognosis than those whose disease begins insidiously (75%) and takes an unfavorable course, with depressive states and continually worsening impairment of cognitive function.
  • The patient's premorbid personality plays a major role. Patients who were described as socially active, intelligent, and integrated children and adolescents before they became ill have a better prognosis than those who were intellectually impaired, timid, introverted and uncommunicative before they became ill. (1)
  • The prognosis seems to be better for patients who have no family history of schizophrenia, those whose families cooperate well, and those whose condition improves rapidly during inpatient treatment.
  • Visual hallucinations are common are correlate with earlier onset, lower IQ and greater clinical impairment as compared to schizophrenic children without visual hallucinations. (David CN. JAACAP 2011)
  • The most common comorbidity in COS is depression (54%), followed by OCD (21%), GAD and ADHD (15% each) (NIMH)
  • A 42-year longitudinal study of patients with childhood-onset schizophrenia revealed their suicide rate to be higher than that of patients with adult-onset schizophrenia.

Imaging

In adolescents with childhood-onset schizophrenia, there is a pattern of whole brain and hippocampal volume reduction and enlargement of ventricular volume compared to normal controls. (Steen RG. meta-analysis, BrJPsych 2006)

Treatment

Atypical antipsychotics are the mainstay of treatment. In the only Double-Blind RCT, clozapine showed somewhat better results vs olanzapine (particularly in improving negative symptoms), but also more side effects. In the open-label follow-up most children were switched from olanzapine to clozapine. (2)

In treatment of early-onset schizophrenia spectrum disorders (TEOSS) study, (n=116), first- and second-generation antipsychotics were compared in 8-19 year-olds. Efficasy of risperidone, olanzapine, and molidone (10-140 mg/day) was comparable, but SGA's caused significant weight gain, and olanzapine was associated with hyperlipidemia. (5)

Other Pearls

  • Anxiety/stress is the most common cause of hallucinations in preschool children.
  • Visual hallucinations are common in COS, and are associated with greater clinical impairment and greater compromise in overall brain functioning. (3)
  • On imaging, COS children show progressive loss of gray matter during adolescence (this is not found in adult schizophrenics)
  • Other CNS changes include delayed/disrupted white matter growth, and a progressive decline in cerebellar volume, some of which are shared by their healthy siblings.

Black Belt Info

  • For NIMH research purposes a heterogeneous group of children with transient psychotic symptoms and multiple developmental abnormalities had been termed the Multi Dimensionally Impaired (MDI) group.
    • These children have cognitive deficits, psychotic symptoms in response to stress without a thought disorder, impaired interpersonal skills, ADHD symptoms, and emotional dysregulation.
    • They are at risk for developing bipolar disorder later in life. [6]
  • For children on clozapine who develop neutropenia, lithium can be added for clozapine rechallenge [2cases:(4)]

References

1. Neuropsychobiology 2012;66(1):63-9 "Early-onset schizophrenia"

2. Shaw P et.al Childhood-onset schizophrenia: A double-blind, randomized clozapine-olanzapine comparison. Arch Gen Psychiatry. 2006 Jul;63(7):721-30.

3. David Cn et. al. Childhood onset schizophrenia: high rate of visual hallucinations.J Am Acad Child Adolesc Psychiatry. 2011 Jul;50(7):681-686.e3. Epub 2011 Jun 11.

4. Sporn A, et al.: Clozapine-induced neutropenia in children: Management with lithium carbonate. J Child Adolesc Psychopharmacol 13(3):401–404, 2003

5. Sikich, L., Frazier JA. et.al.: Double-blind comparison of first- and second-generation antipsychotics in early-onset schizophrenia and schizo-affective disorder: findings from the treatment of early-onset schizophrenia spectrum disorders (TEOSS) study. Am J Psychiatry. 2008 Nov;165(11):1420-31.

6. Nicolson R, Lenane M, Brookner F, et al. Children and adolescents with psychotic disorder not otherwise specified: a 2- to 8-year follow-up study. Compr Psychiatry. 2001;42:319-325.