Selective Mutism

I recently had contact from a teacher with a student recently diagnosed with Selective Mutism. Here is some general information that may be helpful:

According to the DSM-IV-TR Selective Mutism is when a child continually (for at least one month, not including the 1st week of school) fails to speak in specific social situations while still speaking in other situations. For example the child will speak to parents at home, but won’t speak at school. (This diagnosis would not be appropriate for a child diagnosed with PDD, a communication disorder, or a psychotic disorder).
Children with Selective Mutism often have severe impairment in school and social functioning. They may be teased by peers in school. Children with this diagnosis are often also diagnosed with an Anxiety Disorder.
This diagnosis is fairly rare, affecting less than 1% of people seen in mental health settings. Usually Selective Mutism has an onset before age 5, but may not be noted until the child starts school. It could last a few weeks to a few years.
As with presentation of other mental health issues a child presenting with these symptoms should be referred to professional services.