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Schizophrenia in Children & Adolescents

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General Facts:

  1. About 1 in 40,000 children is diagnosed with schizophrenia, compared to 1 in 100 in adults.
  2. Schizophrenia ranks among the top 10 causes of disability worldwide.
  3. Children with schizophrenia may share symptoms with--and have their symptoms mistaken for--autism or other pervasive developmental disabilities, which affect about 1 in 500 children.
  4. Child schizophrenia patients are harder to treat and have a worse prognosis than adult schizophrenia patients.
  5. It is often preceded in children by developmental disturbances, such as lags in motor and speech/language development; such problems tend to be associated with more pronounced brain abnormalities.
  6. Symptoms appear prior to age 12.
  7. Children with schizophrenia often see or hear things that do not really exist, and harbor paranoid and bizarre beliefs.

Causes & Research:
Although it is unclear whether schizophrenia has a single or multiple underlying causes, evidence suggests that it is a neurodevelopmental disease likely involving a genetic predisposition, a prenatal insult to the developing brain, and stressful life events. The role of genetics has long been established; the risk of schizophrenia rises from 1% with no family history of the illness, to 10% if a first degree relative has it, to 50% if an indentical twin has it. Prenatal insults may include viral infections, such as maternal influenza in the second trimester, starvation, lack of oxygen at birth, and untreated blood type incompatibility. Studies find that children share with adults many of the same abnormal brain structural, physiological, and neuropsychological features associated with schizophrenia. The children seem to have more severe cases than adults, with more pronounced neurological abnormalities. This makes childhood-onset schizophrenia potentially one of the clearest windows available for research into a still obscure illness process.
For example, unlike most adult-onset patients, children who become psychotic prior to puberty show conspicuous evidence of progressively abnormal brain development. In the first longitudinal brain imaging study of adolescents, magnetic resonance imaging (MRI) scans revealed fluid filled cavities in the middle of the brain enlarging abnormally between ages 14 and 18 in teens with early-onset schizophrenia, suggesting a shrinkage in brain tissue volume. These children lost four times as much gray matter, neuroms and their branch-like extensions, in their frontal lobes as normally occurs in teens. This gray matter loss engulfs the brain in a progressive wave from back to front over five years, beginning in rear structures involved in attetion and perception, eventually spreading to frontal areas responsible for organizing, planning, and other "executive" functions impaired in schizophrenia. Since losses in the rear areas are influenced mostly by environmental factors, the researchers suggest that some non-genetic trigger contributes to the onset and initial progression of the illness. The finaly loss pattern is consistent with that seen in adult schizophrenia. Adult-onset patients' brains may have undergone similar changes when they were teens that went unnoticed because symptoms had not yet emerged, suggest the researchers
In addition to studies of brain structural abnormalities, researchers are also examining a group of measures associated with genetic risk for schizophrenia. Early-onset cases of illness have recently proven crucial in the discovery of genes linked to other genetically complex disorders like breast cancer, Alzheimer's, and Crohn's disease. Hence, children with schizophrenia and their families may play an improtant role in deciphering schizophrenia's molecular roots. Evidence suggests that the rate of genetically-linked abnormalities is twice as high in children as in adults with the illness. Similarly, schizophrenia spectrum disorders, thought to be genetically related to schizophrenia, are about twice as prevalent among first-degree relatives of childhood-onset patients. In one recent study, a third of the families of individuals with childhood onset schizophrenia had at least one first-degree relative with a diagnosis of schizophrenia, or schizotypal or paranoid personality disorder. This profile of psychiatric illness is remarkably similar to that seen in parents of adult-onset patients, adding to the likelihood that both forms share common genetic roots. Other anomalies associated with adult schizophrenia, such as abnormal eye movements, are also common in families of children with the illness.

  1. Problems paying attention
  2. Impaired memory & reasoning
  3. Speech impairments
  4. Inappropriate or flattened expression of emotion
  5. Poor social skills
  6. Depressed mood

Such children may laugh at a sad event, make poor eye contact, and show little body language or facial expression.

Misdiagnosis of schizophrenia in children is all too common. It is distinguished from autism by the persistence of hallucinations and delusions for at least six months and at a later age of onset (seven years or older). Autism is usually diagnosed by age three. Schizophrenia is also distinguished from a type of brief psychosis sometimes seen in affective, personality and dissociative disorders with children.
Adolescents with bipolar disorder sometimes have acute onset of manic episodes that may be mistaken for schizophrenia. Children who have been victims of abuse may sometimes claim to hear voices of--or see visions of--the abuser. Symptoms of schizophrenia characteristically pervade the child's life, and are not limited to just certain situations, such as at school. If children show any interest in friendships, even if they fail at maintaining them, it is unlikely that they have schizophrenia.

Treatments that help young patients manage their illness have improved significantly in recent decades. As in adult, antipsychotic medications are especially helpful in reducing hallucinations and delusions. The newer generation "atypical" antipsychotics, such as olanzapine and clozapine, may also help improve motivation and emotional expressiveness in some patients. They also have a lower likelihood of producing disorders of movement, including tardive dyskinesia, than the other antipsychotic drugs such as haloperidol. However, even with these newer medications, there are side effects, including excess weight gain that can increase risk of other health problems. The NIMH (National Institute on Mental Health) is conducting research studies to improve treatments ( Children with schizophrenia and their families can also benefit from supportive counseling, psychotherapies, and social skills training aimed at helping them cope with the illness. They likely require special education and/or other accommodations to succeed in the classroom.