HOXB7 is a sequence-specific transcription factor that functions as a master regulatory gene in cancer progression and metastasis. As a homeodomain protein, HOXB7 orchestrates various target molecules and activates multiple oncogenic pathways 1. The protein demonstrates significant clinical relevance as a prognostic biomarker across multiple solid tumor types. Meta-analyses reveal that high HOXB7 expression consistently correlates with poor overall survival (HR=1.98), advanced TNM staging, lymph node metastasis, and distant metastasis in solid malignancies 2. In digestive system cancers specifically, HOXB7 overexpression predicts poor prognosis with hazard ratios around 2.0 and associates with tumor invasion and metastatic spread 3. Mechanistically, HOXB7 promotes cancer cell proliferation and invasion, as demonstrated in lung adenocarcinoma where silencing HOXB7 inhibited both growth and metastasis in vitro and in vivo 4. The protein also regulates epithelial-mesenchymal transition pathways, with HOXB7 serving as an upstream transcription factor for genes like STN1 that promote metastasis 5. Additionally, HOXB7 dysregulation occurs in hematological disorders, where it affects mesenchymal stem cell function in myelodysplastic syndrome transformation 6. These findings establish HOXB7 as both a valuable prognostic marker and potential therapeutic target across various cancer types.