BCL9与B细胞急性淋巴细胞白血病相关可能是1q21异常的b细胞恶性肿瘤易位的靶点。它的功能未知。BCL9的过度表达可能在B细胞恶性肿瘤中具有致病意义[由RefSeq提供，2008年7月]
BCL9 is associated with B-cell acute lymphoblastic leukemia. It may be a target of translocation in B-cell malignancies with abnormalities of 1q21. Its function is unknown. The overexpression of BCL9 may be of pathogenic significance in B-cell malignancies. [provided by RefSeq, Jul 2008]