True or false: Internal echoes alone are sufficient to call a breast cyst complex?

True or false: Internal echoes alone are sufficient to call a breast cyst complex?

• A. True
• B. False
• C. Depends on size
• D. Only with vascularity

Answer: (B)

In breast ultrasound, distinguishing a simple cyst from a complex one depends on more than just what the fluid inside looks like. Internal echoes can arise from debris, old blood, or protein-rich content within a cyst and don’t automatically mean the lesion is complex. A complex cyst is suspected when there are additional features such as septations, thick or irregular walls, mural nodules, or a solid intracystic component, and sometimes when vascularity is seen on Doppler. If those accompanying features aren’t present, the cyst can still be considered simple despite internal echoes. Size and the presence of vascularity alone do not reliably define a cyst as complex, so internal echoes alone are not sufficient to call it complex.

In breast ultrasound, distinguishing a simple cyst from a complex one depends on more than just what the fluid inside looks like. Internal echoes can arise from debris, old blood, or protein-rich content within a cyst and don’t automatically mean the lesion is complex. A complex cyst is suspected when there are additional features such as septations, thick or irregular walls, mural nodules, or a solid intracystic component, and sometimes when vascularity is seen on Doppler. If those accompanying features aren’t present, the cyst can still be considered simple despite internal echoes. Size and the presence of vascularity alone do not reliably define a cyst as complex, so internal echoes alone are not sufficient to call it complex.