Episodic Behavioural Regression in an 8-Year-Old Female:Sequelae of 22q11.2 Duplication Syndrome

22q11.2 duplication syndrome is a recently discovered genetic syndrome with unclear neuropsychiatric sequelae. While itsconnection to 22q11.2 deletion syndrome is actively investigated, case reports on the neuropsychiatric sequelae of affectedindividuals have been previously described, largely focusing on comorbid autism spectrum disorder. Here, we present the caseof an 8-year-old female experiencing episodes of severe behavioural regression following medical illness. We analyze the case andrelate it to the available literature and identify potential risk factors.