TCF4 and breast cancer: Among the genes correlating with BC, the transcription factor TCF7L2, known as Transcription Factor 7 like 2 also known as alias Transcription Factor 4 (TCF4), was found to have a significant correlation to the blast cell numbers (Pearson correlation coefficient r = 0.52, two-sided Pearson test p-value = 0.00052, Figure 1A).