What does petroclival mean?
Petroclival meningiomas, by definition, are tumors that originate in the upper two thirds of the clivus at the petroclival junction medial to the fifth cranial nerve. 1,2. These tumors often displace the brain stem and the basilar artery to the opposite side.
What is petrous meningioma?
Posterior fossa / petrous meningioma forms on the underside of the brain and accounts for approximately 10 percent of meningiomas. It can press on the cranial nerves, causing facial and hearing problems. Petrous meningiomas can press on the trigeminal nerve, causing a condition called trigeminal neuralgia.
Can meningiomas stop growing?
Even relatively large meningioma can suddenly stop growing5, 6. Many neurosurgeons therefore generally avoid operating on patients with benign meningiomas, particularly in those cases where the pathology is relatively small or difficult to access surgically and the patient is not symptomatic.
What is responsible for the thickening of the brain?
Because meningiomas tend to grow inward, they commonly cause pressure on the brain or spinal cord. They can also grow outward causing the skull to thicken (hyperostosis). Figure 1. A meningioma is a tumor that grows from the dura membrane (blue) covering the brain and spinal cord.
Where does petroclival meningioma occur in the brain?
Petroclival meningioma arises in the upper two-thirds of the clivus at the petroclival junction medial to the fifth cranial nerve. This case is a presumptive diagnosis based on the typical imaging appearances, other differentials are felt unlikely.
What is the petroclival meningioma impairment scale ( pcmis )?
The petroclival meningioma impairment scale (PCMIS) provides a specific tool for quantitative assessment of the patient’s state 7) The rarity of the tumor, different treatment philosophies, and variations in reporting complicate the outcome analysis.
Where is the petroclival junction in the brain?
The petroclival junction is located almost in the middle of the skull. In surgery, this area is difficult to approach without injuring neighboring tissue, including delicate veins and nerves supplying various regions of the brain. Historically, these tumors were often regarded as inoperable.
What kind of tumor is in the right petroclival region?
MRI images show an extra-axial tumor at the right petroclival region, which extends into the right cavernous sinus and encases the right ICA. The tumor is solid and enhances vividly after contrast administration. Loading images…
