FOXB2 is a forkhead box transcription factor with dual and context-dependent roles in disease. As an RNA polymerase II-specific DNA-binding transcription factor, FOXB2 regulates genes involved in cell differentiation and anatomical structure morphogenesis 1. In pancreatic cancer, FOXB2 functions as a tumor suppressor. FOXB2 expression is typically silenced through CpG island methylation in pancreatic ductal adenocarcinoma cells, and its reintroduction reduces spheroid formation, suppresses β-catenin expression, and diminishes cancer stem cell populations with high metastatic potential 1. Conversely, in prostate cancer, FOXB2 acts as a potent Wnt pathway activator, promoting malignant transformation. FOXB2 induces multiple Wnt ligands including WNT7B and cooperates with cofactors (YY1, JUN, DDX5) to drive neuroendocrine differentiation of prostate cancer cells, which correlates with decreased recurrence-free survival 2. Beyond cancer, FOXB2 has been identified as a biomarker component in preeclampsia diagnosis, where it is downregulated in patient serum 3. Additionally, transcriptomic analyses in Alzheimer's disease models identified FOXB2 as a critical regulatory gene linked to neuroprotection through modulation of apoptosis and synaptic plasticity 4. These findings demonstrate that FOXB2 functions as a tissue and context-specific transcriptional regulator with opposing roles in different malignancies and potential relevance to neurodegenerative and reproductive diseases.