This study detected the involvementof genes associated with Alzheimer’s disease (MEF2Cand EXOC4 genes) and schizophrenia (MEF2C, CYP2D6,FAM109B, SEPT3, NAGA, TCF20, and NDUFA6 genes). The gene discussed is CYP2D6; the disease is early-onset autosomal dominant Alzheimer disease.