Ultrasound may be helpful in the diagnosis of fibroadenoma. Findings on ultrasound suggestive of fibrodenoma include a well-circumscribed, round to ovoid, macrolobulated mass that is generally uniformly hypoechogenic.

• Ultrasound may be helpful in the diagnosis of fibroadenoma.
• It is the most commonly used breast imaging method in adolescents. It can determine if a mass is solid or cystic. Findings on ultrasound suggestive of fibrodenoma include:^[1][2][3]

• Well-circumscribed, round to ovoid mass
• Macrolobulated mass with a smooth contour
• Uniformly distributed weak internal echoes
• Intermediate acoustic attenuation
• Surrounded by a thin echogenic rim (pseudocapsule)
• Calcification may be detectable in 10% of the cases

• Serial ultrasounds may be needed look for changes in the size of the fibroadenoma overtime.^[2]
• Ultrasound may lack the ability to distinguish benign masses from cancer.^[4]