HOXD11 is a sequence-specific transcription factor that plays critical roles in developmental patterning and disease pathogenesis. During embryonic development, HOXD11 functions as part of a regulatory system that provides positional identity along the anterior-posterior axis, particularly in skeletal development 1. The gene is essential for proper formation of the axial and appendicular skeleton, with mutations causing vertebral transformations, carpal bone fusions, and reduced digit length 1. HOXD11 demonstrates functional equivalence with its paralogue HOXA11 in zeugopod development and can quantitatively compensate for HOXA11 loss 1. In adult tissues, HOXD11 expression varies significantly across different contexts. In endometrial tissue, HOXD11 shows cycle-dependent expression with decreased levels during the secretory phase, suggesting a role in endometrial proliferation rather than differentiation 2. Dysregulation of HOXD11 contributes to multiple pathological conditions. In osteoarthritis, HOXD11 downregulation promotes cartilage degradation through reduced SOX9 and COL2A1 expression and increased matrix metalloproteinases 3. Conversely, HOXD11 upregulation in penile squamous cell carcinoma promotes metastasis via the FN1/MMP2/MMP9 pathway and correlates with poor prognosis 4. HOXD11 is also involved in hematological malignancies through fusion with NUP98 in acute myeloid leukemia 5.