Subsequent TMA studies demonstrated that expression of MUM1 in at least 30% of tumor cells was associated with a significantly worse outcome (Chang et al. 2004; Hans et al. 2004; Tzankov et al. 2006; Muris et al. 2006b; van Imhoff et al. 2006), while other studies found no association between MUM1 expression and outcome (Colomo et al. 2003; Berglund et al. 2005). Here, IRF4 is linked to neoplasm.