Typical ultrasound appearance of a breast hamartoma located at the upper outer quadrant of the left breast. It is a well-circumscribed oval-shaped lesion with both hyperechoic and hypoechoic components (depending on breast echotexture the margins are often difficult to delineate). It is a soft lesion and, usually, under pressure it is clearly compressible.
Simple cyst at the 3:00 o'clock position of the left breast (also depicted on the mammography).