Presentation:A 23 years old primagravida presented for routine sonographic scan with no significant complaints. According to the patient, menstrual age was approximately 30 weeks.
Image 1:MR image confirms the presence of a high-riding third ventricle (
arrow), pointed parallel anterior horns, and dilated occipital horn (colprocephaly).
Image 2:
Transverse sonogram of the fetal brain shows dilation of the occipital horn (curved arrow) and a high-riding third ventricle (arrow).
Image 3
Image 4: Axial fetal cranium
There is prominence of the ventricles but more in the occipital horns.
Image 5: Oblique fetal cranium
Image 6: long axis fetal femur
Image 7: long axis fetal femur
Image 8:Another MR image shows wide divergence of the frontal horns and elevation of the third ventircle.
Comment:
There are two different diagnoses to this case. Visualization of the cavum septum pellucidum is absent in the fetal brain. There is an association with chromosomal disorders such as trisomy 18, holoprosencephaly, etc. of the fetal head. The fetal bone images represent a genetic disorder.