The term "excessive" in the report indicates that there is a significant number of these microangiopathic changes in the brain tissue, which could be a sign of underlying issues or potential complications. However, the specific nature and implications of these findings would depend on additional factors, including the exact location of the abnormalities, the patient's medical history, and other imaging results.
It is important to note that a radiologist or healthcare professional would need to assess the MRI findings in the context of the patient's overall condition and medical history to determine the significance and appropriate course of action.