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Phelan-McDermid syndrome, also known as Phelan-McDermid syndrome, is a disorder caused by the loss of a tiny piece of chromosome 22. The characteristics of 22q13. 3 deletion syndrome vary widely and cover various regions of the body. Poor eye contact, sensitivity to touch, and aggressive behaviour are all typical of autism or autistic-like behaviors that influence communication and social interaction. People with this illness have seizures or lose skills that they had already acquired less often. Individuals with a 22q13. 3 deletion syndrome have a reduced sensitivity to pain. Some people with this disorder have episodes of frequent vomiting and nausea, as well as backflow of stomach acids into the esophagus. People with 22q13. 3 deletion syndrome have distinctive facial features, such as a long, narrow head; prominent ears; a prominent chin; droopy eyelids; and deep-set eyes. Some of the affected individuals are seeing rapid growth.
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