Comparative genomic hybridization identified a 560 Kb (chr14: 37,627,931-38,187,142; hg19) duplication at 14q21.1 which contains two genes; mirror-image polydactyly gene 1 (MIPOL1) which is associated with mirror image polydactyly, and Forkhead box protein A1 (FOXA1) which is a transcription factor found to be overexpressed in some tumor types. This evidence concerns the gene FOXA1 and neoplasm.