What does iso attenuating mean on a mammogram?

Isoattenuating means that the density of the tissue in question is similar to the density of the surrounding tissue. In the context of a mammogram, isoattenuating can refer to the appearance of a breast mass or lesion. When a mass is isoattenuating, it means that it has the same density as the surrounding breast tissue and may not be easily visible on the mammogram. This can make it more challenging to detect and diagnose breast cancer.

However, it's important to note that isoattenuation does not necessarily mean that a mass is cancerous. There are other benign conditions that can also cause isoattenuating masses, such as fibroadenomas or cysts. Therefore, further imaging tests or biopsies may be necessary to determine the exact nature of an isoattenuating mass.