Some can have one or both.....but BI symptoms r very similar to Chiari so it can be difficult to know without testing.
For those that do not know what BI is-
Basilar invagination occurs when the top of the C2 vertebrae migrates upward. It can cause the opening in the skull where the spinal cord passes through to the brain (the foramen magnum) to narrow. It also may press on the lower brainstem.
I had surgery on Aug 28th this year. I fell a year ago, and the injury to my head cause basilar invagination, which in turn caused the Chiari. I had decompression surgery for the Chiari, and two rods and four screws to hold my C spine straight, so it wouldn't tip back into my brain stem the way it wass. you can see basilar invagination on your MRI. Mine was pretty obvious.
Thank u for sharing ur info and what u know in reference to BI.....And u r right a retroflexed odontoid or BI is seen on a MRI.....
How r u doing post op? All ur issues were acquired?....We do not get many that have acquired Chiari...many have the symptoms triggered by an accident or fall....
BI and a retroflexed Odontoid r much the same....Basilar invagination is a developmental anomaly of the craniovertebral junction in which the odontoid abnormally prolapses into the foramen magnum. It is often associated with other osseous anomalies of the craniovertebral junction. Basilar invagination is also associated with neural axis abnormalities, including Chiari malformation, syringomyelia, syringobulbia, and hydrocephalus. Patients frequently present with neurologic symptoms and deficits and warrant surgical treatment to prevent progression.
I had both chiari 2 and basilar invagination. There is very little research on it, but there is a great article by Dr. Rekate I believe available in google books. I believe it will come up if you google Dr. Rekate basilar invagination.
hi sweetboyroy...i had decompresseion surgery and might have fusion surgery in the beginning of next year.can u tell me how u feel now? i have also signs my c2 is to close to brainstem plus craniocervical instability...could u tell me how u feel after fusion and u cope with the moving restriction? do u feel better now?
I have just been diagnosed with BI with Chiari 1 after an MRI from 9 seizures I had. I was discharged from hospital after 6 days, the doc said I would be reviewed by the neurosurgeons in an MDT meeting. I have severe kneck and back pain and it feels like there is a vice squashing the back of my head. The doctors have not told me anything. Is this normal for this conditions. Would be very greatful if anyone could help.
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