Although histology was not available for most patients, there was no significant difference between histology, with invasive ductal carcinoma (IDC) and invasive lobular carcinoma (ILC) having similar proportions of patients with TF-low (36.7% IDC vs. 40.3% ILC, respectively), TF-int (22.9% IDC vs. 23.9% ILC, respectively), and TF-high (40.2% IDC vs. 35.8% ILC, respectively). This evidence concerns the gene TF and invasive lobular breast carcinoma.