Let’s start with an analysis of why there is blood flow.
There is also blood flow in the normal breast, because the glands, fat, and skin of the breast need nutrients, and blood flow is what provides nutrients to these tissues, and blood flow carries nutrients to wherever they are needed, including the breast nodes.
Because when the nodule is small, the amount of nutrients needed is low, and the blood flow that provides nutrients will be so thin or slow that the ultrasound doesn’t reach it, so there will be no indication of blood flow on the report. Some nodules have blood flow on ultrasound. Benign nodules have blood flow, mainly because the nodules are larger and require more nutrients, and the blood flow will be thicker or flow faster, which is obvious on ultrasound.
Malignant nodes are more likely to have blood flow detected on ultrasound because they grow more rapidly, that is, malignant tumor cells divide faster and more. As they proliferate like crazy, they will need more nutrients, so blood flow will be more visible at this stage.
But because of differences in ultrasound resolution, individual patient condition, and physician level, malignant nodes sometimes may not always be able to detect blood flow either. Therefore, it is not necessary to be overly nervous about ultrasound signals suggesting blood flow, which is not necessarily malignant.