PLAGL2 and lipoblastoma: Another factor stimulating the activity of the canonical Wnt pathway is pleiomorphic adenoma gene like 2 (PLAGL2), a putative C2H2 zinc finger transcription factor, identified through its structural homology to PLAG1, another member of the same family and a proto-oncogene frequently rearranged and overexpressed in pleiomorphic salivary gland adenomas and lipoblastomas.