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Immunohistochemical staining of BCL9 in PCa and benign prostate tissues reveals that BCL9 is upregulated in PCa tissues. Positive BCL9 staining with (A) low, (B) intermediate and (C) high expression levels in PCa observed predominantly in the cell nuclei. (D) Negative BCL9 staining in benign prostate tissue. BCL9, B-cell lymphoma 9; PCa, prostate cancer.
