Absent septum pellucidum (fetal MRI)

Case contributed by Dr Nick Tarasov


24 weeks pregnancy. Absent septum pellucidum revealed on US examination, holoprosencephaly and corpus callosum dysgenesis are not excluded.

Patient Data

Age: 20 years
Gender: Female

Single lateral ventricle, characteristic pattern of the septum pellucidum agenesis

  • no pathological connection between ventricles and hemispheric fissure
  • single lateral ventricle, borders of the cavum septum pellucidum are not identified
  • moderate dilation of the occipital horns
  • different axis of the eyeballs, deviation of the left
  • corpus callosum has a normal anatomy
  • thoracic and abdominal cavities of the fetus without abnormal signals
  • normal position of the placenta
  • no diffusion restriction

Case Discussion

There are signs of the septum pellucidum agenesis, it could be isolated as well as combined with septo-optic dysplasia. It is difficult to answer the question why the globes have a different axis and may be due to either due to eye movement or strabism. 

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Case information

rID: 56337
Published: 30th Oct 2017
Last edited: 7th Nov 2017
Inclusion in quiz mode: Included
Institution: USMU

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