Expression of the Forkhead Transcription Factor FOXP1 is Associated with Tumor Grade and Ki67 Expression in Clear Cell Renal Cell Carcinoma

Expression of FOXP1 and Ki67 was immunohistochemically assessed on tissue microarrays of 129 cases of clear cell renal cell carcinomas. Overall and disease-specific survival correlated inversely with pT-category, grading and lymph node metastasis in (p < .05). Expression of FOXP1 correlated negatively with tumor grading (p = .02), but neither with pT-category nor with lymph node metastasis. Significant positive correlation was shown for Ki67 expression and tumor stage and lymph node metastasis (p < .05). The overall survival and the disease-specific survival correlated negatively with the Ki67 status (p < .05). FOXP1 expression negatively correlated with Ki67 expression in clear cell renal cell carcinomas (p = .036).