Ultrasound lesion is a term used to describe any abnormality or damage seen on an ultrasound scan. It can refer to any kind of damage or anomaly, including cysts, tumors, and other growths. Ultrasound lesions are usually discovered during routine medical tests, such as during pregnancy or when a person is having a scan due to an underlying medical condition. Doctors use the information obtained from an ultrasound lesion to diagnose and treat conditions, or to monitor a person’s health. Ultrasound lesions are also used in research studies to better understand particular diseases and conditions.