MUC1 and cancer: The IHC staining pattern TA-MUC1pos + GPERneg + ERαneg, i.e., expression of TA-MUC1 without co-expression of any of the two ERs, was detected in 18 cases and was associated with advanced FIGO stage (p = 0.004), cancer spread to retroperitoneal lymph nodes (p = 0.021) and poor histologic differentiation (p = 0.011) (Table 3).