case_images: PMC11380810_01
case_images: PMC11380810_02
case_images: PMC11380810_03
case_images: The initial computed tomography (CT) and magnetic resonance imaging (MRI) images used for diagnosis at 21 days of age. (a) CT brain sagittal cuts (bone window) at the level of the right cribriform plate showing two bony defects with a very thin bone plate in between. (b) CT brain axial cuts showing right nasal cavity soft-tissue mass deviating the nasal septum toward the left side. (c) MRI brain coronal images show the continuity of the herniated nasal soft-tissue mass with the intracranial brain tissue through the anterior cranial fossa defect. (d) MRI brain axial images show the herniated soft-tissue mass within the right nasal cavity.
case_images: SNI-15-275-g001.jpg
case_images: PMC11380810_03_SNI-15-275-g001.jpg
case_images: F1
case_images: The findings were suggestive of a nasal transethmoidal encephalocele [Figure 1].
case_images: PMC11380810_04
case_images: PMC11380810_05
case_images: Postoperative magnetic resonance imaging of the brain with coronal images done after the transcranial surgery showing a layered obliteration and separation of the anterior cranial fossa floor from the nasal cavity beneath. The remnant (to be removed later) soft-tissue sac can still be appreciated in the nasal cavity.
case_images: SNI-15-275-g002.jpg
case_images: PMC11380810_05_SNI-15-275-g002.jpg
case_images: F2
case_images: Postoperative MRI showed adequate reconstruction of the anterior cranial fossa floor with complete separation of the intracranial and nasal cavities [Figure 2].
case_images: Pre- and post-operative computed tomography of the brain with axial images done before and after the transnasal surgery. (a) The herniated sac remnant can still be visualized occupying the right nasal cavity before surgery. (b) No more brain tissue can be seen within the right nasal cavity after surgery.
case_images: SNI-15-275-g003.jpg
case_images: PMC11380810_05_SNI-15-275-g003.jpg
case_images: F3
case_images: In the second stage, a transnasal surgery was carried out successfully by the otorhinolaryngologist service to remove the remaining intranasal soft-tissue mass [Figure 3].