Last revised by Mostafa El-Feky on 21 Jan 2022

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 subtypes (e.g. interorbital proboscis).

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

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

'Proboscis' is derived from the Ancient Greek προβοσκις (proboskis), itself derived from the words πρό (pro) meaning: "forth/forward/before" and βόσκω (bosko) meaning: "to feed".

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Cases and figures

  • Case 1
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  • Case 2: cyclopia with proboscis (3D ultrasound)
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