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US Case of the Day

Teresita L. Angtuaco, MD1,2, Edgardo J. Angtuaco, MD1 and J. Gerald Quirk, Jr, MD, PhD2

1 Departments of Radiology (T.L.A., E.J.A.)
2 Obstetrics and Gynecology (T.L.A., J.G.Q.), University of Arkansas for Medical Sciences, 4301 W Markham, Little Rock, AR 72205.



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Figure 1a.  (a) Coronal US image of the fetal brain shows complete duplication of normal-appearing cerebral structures. The cerebellar hemispheres are not well visualized, and there appears to be fusion at the posterior fossa. A large cystic structure is seen at the level of fusion (arrow). (b) Transverse US image through the fetal orbits demonstrates the two medial orbits (arrows) separated by a very thin septum of bone. (c) Transverse US image of the fetal face obtained just inferior to b shows two noses (arrows) projecting laterally from a shared medial cheek.

 


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Figure 1b.  (a) Coronal US image of the fetal brain shows complete duplication of normal-appearing cerebral structures. The cerebellar hemispheres are not well visualized, and there appears to be fusion at the posterior fossa. A large cystic structure is seen at the level of fusion (arrow). (b) Transverse US image through the fetal orbits demonstrates the two medial orbits (arrows) separated by a very thin septum of bone. (c) Transverse US image of the fetal face obtained just inferior to b shows two noses (arrows) projecting laterally from a shared medial cheek.

 


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Figure 1c.  (a) Coronal US image of the fetal brain shows complete duplication of normal-appearing cerebral structures. The cerebellar hemispheres are not well visualized, and there appears to be fusion at the posterior fossa. A large cystic structure is seen at the level of fusion (arrow). (b) Transverse US image through the fetal orbits demonstrates the two medial orbits (arrows) separated by a very thin septum of bone. (c) Transverse US image of the fetal face obtained just inferior to b shows two noses (arrows) projecting laterally from a shared medial cheek.

 


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Figure 2.  Photograph demonstrates the postmortem appearance of the neonate.

 


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Figure 3.  Postmortem photograph of the neonate demonstrates typical features of diprosopus tetraophthalmos with characteristic duplication of facial structures. The two faces share a medial cheek and ear, and normal-appearing ears are seen bilaterally.

 


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Figure 4.  Postmortem radiograph demonstrates duplication of the cervical spine with multiple abnormal cervical and thoracic vertebrae.

 


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Figure 5. Figures 5, 6. (5) Coronal T1-weighted spin-echo postmortem MR image of the conjoined brains (repetition time msec/echo time msec = 650/16) shows complete separation of the cerebral hemispheres. The cerebella (arrows) are markedly hypoplastic. A large fluid collection is seen inferior to the cerebellar hemispheres and is common to both brains. (6) Photograph of the conjoined brains (posterior view) helps confirm the findings at prenatal US and postmortem MR imaging (cf Figs 1, 5).

 


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Figure 6. Figures 5, 6. (5) Coronal T1-weighted spin-echo postmortem MR image of the conjoined brains (repetition time msec/echo time msec = 650/16) shows complete separation of the cerebral hemispheres. The cerebella (arrows) are markedly hypoplastic. A large fluid collection is seen inferior to the cerebellar hemispheres and is common to both brains. (6) Photograph of the conjoined brains (posterior view) helps confirm the findings at prenatal US and postmortem MR imaging (cf Figs 1, 5).

 


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Figure 7.  Coronal T1-weighted (400/16) postmortem MR image of the chest and abdomen helps confirm the presence of a left-sided diaphragmatic hernia. The heart (arrow) is displaced within the right hemithorax.

 





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