What is the first-line imaging technique for suspected breast cancer in individuals under 35 years old?

The first-line imaging technique for suspected breast cancer in individuals under 35 years old is ultrasound. In this age group, breast tissue tends to be denser, which can make it more challenging for mammography to detect abnormalities effectively. Ultrasound is particularly useful for evaluating breast lumps in younger women because it helps to differentiate between solid masses and fluid-filled cysts, providing clear real-time imaging without exposing the individual to radiation, which is especially important for younger patients.

Mammography is typically more effective in older individuals whose breast tissue is less dense, but its utility is limited in younger women due to the reasons mentioned. CT scans are generally not used for breast cancer detection and are more effective for other indications. MRI is a more sensitive imaging technique but is usually reserved for specific scenarios, such as evaluating known breast cancer or assessing high-risk patients rather than being the first-line approach.