EMX2 is a homeodomain-containing transcription factor with dual roles in neurodevelopment and cancer regulation. During central nervous system development, EMX2 acts as a dorsal cortical marker expressed in neuroblasts and postmitotic Cajal-Retzius cells, controlling neuroblast proliferation, migration, and differentiation 1. Its graded distribution along the antero-posterior and medial-lateral cortical axes patterns the forebrain and specifies cortical territories and area identity, functioning cooperatively with Otx2 and Pax6 1. EMX2 also participates in gonadal differentiation as a non-SRY-linked gene controlling testis development 2. In cancer biology, EMX2 functions as a tumor suppressor, frequently downregulated through epigenetic silencing via promoter methylation. In colorectal cancer, EMX2 downregulation associates with distant metastasis and reduced survival, with knockdown increasing tumor cell migration 3. Similarly, in lung cancer and esophageal adenocarcinoma, EMX2 restoration suppresses cell proliferation, invasion, and epithelial-mesenchymal transition while inhibiting WNT and AKT/mTOR signaling pathways [PMID:20697358; 44]. In malignant pleural mesothelioma, low EMX2 expression predicts poor progression-free survival 5. An antisense transcript, EMX2OS, displays coordinated expression with EMX2, suggesting regulatory function 6.