This site is targeted at medical and radiology professionals, contains user contributed content and material that may be confusing to a lay audience. Use of this site implies acceptance of our Terms of Use.


Proboscis is a rare congenital anomaly where an anterior appendage like structure is seen projecting from the midline fetal face/forehead. Depending on the exact location, this has further been classified into various sub types (e.g. inter-orbital proboscis).



The presence of a proboscis can be associated with several anomalies which include:

Radiographic features

Antenatal ultrasound

A proboscis is best seen on a longitudinal facial profile view as a snout like protrusion from the face/forehead.

History and etymology

The word proboscis is derived from the Greek word proboskis which in turn derives from the combination of the words πρό (pro) meaning: "forth/forward/before" and βόσκω (bosko) meaning: "to feed/nourish"

See also

Updating… Please wait.


Error Unable to process the form. Check for errors and try again.

Alert_accept Thank you for updating your details.