Anechoic areas appear completely black on ultrasound because they don’t reflect sound waves

They usually indicate fluid-filled structures like cysts, blood vessels, amniotic fluid or the bladder

Concerning findings: irregular shape, internal echoes, septations  — may indicate infection, abscess, or tumor

Benign findings: smooth, well-defined borders (like simple cysts or ovarian follicles)

Recognizing these areas is key for accurate diagnosis and proper patient care

Next steps: follow-up imaging, specialist consultation, or treatment depending on the cause