Maternal 15q11.2-q13.1 duplication syndrome-associated psychosis and mania: a new case and review of the literature

Maternal 15q11.2-q13.1 duplication syndrome is associated with a variety of developmental and neuropsychiatric abnormalities. Although schizophrenia-like presentations have been reported, details pertaining to the nature of the corresponding psychotic symptoms and their response to treatment have only been described in a few cases, and no reviews summarizing the literature currently exist. As such, we describe a new case of 15q11.2-q13.1 duplication syndrome-associated schizoaffective disorder and also performed a systematic review of the literature. Our patient’s presentation is somewhat unique as she experienced visual hallucinations in the absence of auditory hallucinations. This is also the first report to describe full symptomatic remission in response to relatively low-dose atypical antipsychotic therapy.