PEG3 and invasive ductal breast carcinoma: Precisely, the dataset by Karnoub et al. reported a 3.1-fold decrease (P = 3.6×10−6) of PEG3 mRNA within invasive ductal breast carcinoma (Figure 8, left panel) which is consistent with a study by Richardson et al, where a 5.6-fold reduction (P = 1.86×10−6) of PEG3 expression was found in ductal breast carcinoma (Figure 8, right panel).