Accordingly, the patterns seen in many of the DICER1-related neoplasms are most likely fibroepithelial or phylloides-like (in benign lesions) or adenosarcoma- or blastoma-like (in malignancies), with some neoplasms showing an admixture of diverse primitive tissue elements resulting in a teratoid appearance. This evidence concerns the gene DICER1 and adenosarcoma.