(a) Preoperative CT scan showing a CSF leak in the left cribriform plate
. (b) Seven-month postoperative CT showing a less dense bony closure of the surgical defect.
This mass is infiltrating the left nasal cavity, ethmoidal cells, and cribriform plate
, causing erosion to the plate.
Note the air bubble in the left olfactory fossa, which gives us a hint of the possible site of breach in the lateral lamella of cribriform plate
on patient's left side.
There was also erosion through the cribriform plate
. Destruction of the frontal sinus and frontal bone with intracranial extension into the frontal lobe was evident.
It extends from cribriform plate
of ethmoid bone to nostrils.
Olfactory neuroblastoma (ONB), also known as Esthesioneuroblastoma, is a rare but distinct malignant neuroectodermal tumor arising from the olfactory epithelium of roof of nasal cavity and cribriform plate
. It account for 2 to 3% of intranasal tumors.1
Similar yellow gelatinous material obliterated the right ethmoturbinates rostral to the cribriform plate
. In the brain, cerebellar coning was prominent.
Amebae are aspirated into the nasal cavity through swimming, splashing, or nasal irrigation, and after attaching to the nasal mucosa, migrate across the cribriform plate
to the brain via the olfactory nerves, causing extensive damage to the frontal lobes of the brain (1).
apiospermum infection after a near-drowning include a local spread from sites near the brain, such as the paranasal sinuses or cribriform plate
, and a hematogenous spread from the lungs.
In humans, it invades the central nervous sys tem via the nose, specifically through the olfactory mucosa and cribriform plate
. This usually occurs as a result of the introduction of water into the nasal cavity with water that has been contaminated with N.
In addition, as that author specified, if one draws a line on the lateral projection of the skull, tangential to a point at the location of the cribriform plate
, it intersects the alveolar line at the canine in M.
Understanding the complex anatomy of the skull base is crucial for the safe endoscopic sinus surgery; inadvertent violation of the cribriform plate
may cause CSF leak, direct penetration trauma to the dura, serious intracranial and intracerebral complications.