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Figure 6. Sagittal T2-weighted fat-saturated MR image (5,000/120) shows low T2 signal intensity in a rim-enhancing irregular mass (arrow) in a 69-year-old woman with a mammographically visible mass that was invasive lobular carcinoma. This case is a true-positive finding for the model branch point irregular focal masses, in which masses are not categorized according to T2 signal intensity because low T2 signal intensity was not a reliable predictor of benignity in irregular or spiculated focal masses.