What posterior acoustic signature is typically seen with a simple breast cyst?

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Multiple Choice

What posterior acoustic signature is typically seen with a simple breast cyst?

Explanation:
Fluid-filled breast cysts transmit ultrasound with very little attenuation, so the sound beam passes through easily and the area behind the cyst appears brighter. This posterior brightening is called posterior acoustic enhancement. It is the classic finding for a simple cyst because the fluid interior is anechoic and lacks internal echoes, while solid lesions tend to attenuate more and produce posterior shadowing. Therefore posterior enhancement is the expected posterior signature for a simple breast cyst.

Fluid-filled breast cysts transmit ultrasound with very little attenuation, so the sound beam passes through easily and the area behind the cyst appears brighter. This posterior brightening is called posterior acoustic enhancement. It is the classic finding for a simple cyst because the fluid interior is anechoic and lacks internal echoes, while solid lesions tend to attenuate more and produce posterior shadowing. Therefore posterior enhancement is the expected posterior signature for a simple breast cyst.

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