CYP19A1 and aromatase excess syndrome: Tan and coworkers (2019) [7] reported a patient with a 1.1 Mb duplication at 15q21.2 region (50,382,769–51,568,204)(hg19) involving the CYP19A1 gene (OMIM # 107910), mapped within the 15q21.2 region (51,208,057–51,338,596)(hg19), which is associated with the Aromatase Excess Syndrome (OMIM # 139300) when expression of CYP19A1 is increased.