Which structure is seen on ultrasound as the Eiffel Tower sign?

• A. Ejaculatory Ducts
• B. Verumontanum
• C. Urethral Meatus
• D. Prostatic Urethra

Answer: (B)

The Eiffel Tower sign on ultrasound identifies the verumontanum. This raised area sits in the prostatic urethra where the ejaculatory ducts open. In a sagittal view of the male posterior urethra, the two openings of the ejaculatory ducts flank the verumontanum and create two side projections that resemble the legs of the Eiffel Tower around the central landmark. This makes the verumontanum a recognizable, normal anatomic landmark on ultrasound. The sign isn’t about the ducts themselves as a separate structure, it’s about where they enter the urethra relative to the verumontanum, which distinguishes this region from other parts of the urethra or external structures like the urethral meatus.