Fetal-Brain

A free gallery of high-resolution, ultrasound, color doppler and 3D images
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Ultrasound images of anomalies of the fetal brain:

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1) Dandy-Walker malformation:

Ultrasound image of fetal brain                ulrasound image Dandy Walker anomaly

Dandy Walker malformation             hypoplastic cerebellum

The above ultrasound images of fetal brain show hypoplastic cerebellum and absent vermis with enlarged 4th ventricle which is typical of Dandy-Walker malformation. Images courtesy of Dr. Gidda Ramaiah, India. (Note: click to view larger images).

Reference: 1) http://www.emedicine.com/radio/topic206.htm (free)

                 2) Herniated Dandy-Walker cysts, Prenatal Diagnosis (free article)

2) Aneurysm of Vein of Galen:

color doppler image Vein of Galen        cystic lesion posterior to midbrain

the cystic lesion seen posterior to the thalami and midbrain 

These are ultrasound images of a 30 week old fetus. Sonography of the fetal brain reveals an anechoic (cystic) lesion posterior to the thalamus and the midbrain. Color doppler image reveals significant flow within this lesion. These ultrasound images are diagnostic of aneurysm of the Vein of Galen. Vein of Galen aneurysms are usually diagnosed in the 3rd trimester. They are usually produced by draining of multiple arteriovenous malformations in the adjacent part of the fetal brain. Differential diagnosis of such lesions includes arachnoid cysts (easily diagnosed using color doppler imaging).

Images courtesy of Dr. Anita Kaul, Delhi, India.

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3) Acrania:

3D ultrasound image of fetal brain      sonography of acrania

3D ultrasound image of acrania      fetal brain in acrania

This 12 week fetus shows prolapse of the brain outside the cranial cavity with absence of the cranial vault (calvarium). The brain is  almost normal in size for this gestational age. These ultrasound images are diagnostic of acrania. This has to be distinguished from anencephaly, where the brain is absent or grossly atrophic. The colored pictures show 3D ultrasound images of the fetus. Images taken using a Medison SA 8000, color doppler and 3D ultrasound machine, courtesy of Dr. Arun Mahajan, Delhi, India.

Reference: http://www.thefetus.net/page.php?id=77 (free article and images)

4) Choroid plexus cyst:

ultrasound image showing cyst in the choroid plexus      sonography of fetal brain

ultrasound image of choroid plexus cyst      sonography of choroid plexus cyst

Sonography of the fetal brain revealed a cystic lesion of 9 mm., in the choroid plexus of the left lateral ventricle. These ultrasound images suggest choroid plexus cyst. Images taken using a Nemio-XG color doppler machine. Clinically, isolated choroid plexus cysts without the presence of associated fetal anomalies have little significance (see link below) and are known to resolve spontaneously.  

Reference: 1) significance of choroid plexus cysts (free article- rated excellent).

                   2) Choroid plexus cysts and Trisomy 21 (free abstract)

5) Occipital meningocele with encephalocele:

occipital encephalocele     herniation of brain through defect in the occipital region

ultrasound image shows the encephalocele   

Sonography of the fetal head showed-a) a small skin covered herniation of meninges through a small defect in the occipital region of the skull. b) presence of part of brain tissue in the herniated sac. The 3rd image shows the sac floating in the amniotic fluid. These ultrasound images suggest a diagnosis of occipital meningocele with encephalocele.

Images courtesy of Gunjan Puri, MD, Surat, India. He used a Toshiba Xario machine for these images.

Reference: http://drjoea.googlepages.com/obstetric-3 (visit this page for free ultrasound images and links for this fetal anomaly)

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  This page was last edited on: Wednesday September 17, 2008 02:41 PM  

Copyright ©   2007- All rights reserved- www.ultrasound-images.com Dr. Joe Antony, MD,    265, Girinagar, Cochin- 20, India.

Contact: joe@ultrasound-images.com or drjoea (at) gmail.com