Proboscis
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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).
Pathology
Associations
The presence of a proboscis can be associated with several anomalies which include:
- trisomy 13
- holoprosencephaly
- cebocephaly
- ethmocephaly 3
- cyclopia: often below the level of the proboscis
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
'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".
See also
- proboscis lateralis: considered a different entity
-<a href="/articles/ethmocephaly">ethmocephaly </a><sup>3</sup>- +<a href="/articles/ethmocephaly">ethmocephaly</a> <sup>3</sup>
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Image 1 CT (non-contrast) ( update )
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Case 1
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Image 2 Ultrasound (3D) ( update )
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Case 2: cyclopia with proboscis 3D images(3D ultrasound)
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