Continuation of the new lecture series entitled: "New version of How to read a mammogram - 3/3". This interactive lecture teaches how to find breast cancers in the retroareolar region and also describes the difficulty of finding breast cancers in dense breasts. Demonstration of early breast cancers that alter the parenchymal contour helps the radiologist to pay attention to subtle changes and find non-calcified invasive breast cancers in the size range of 1-14 mm.