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I assume you are referring to MRI exam interpretation, although the terminology can be used with the reading of other types of tests. The signal refers to the appearance of a scan's tissue. It usually is referring to the intensity of the finding on scan, high- signal lesions typically are brighter on the films, and low-signal are darker. Low-signal examples are air and bone, and High-signal examples are fat and bone marrow.
An abnormality can be either intensity, and depend on the type of tissue. Also, different findings are found with and without contrast, and how the magnet is weighted in the pictures taken. Basically, in order to interpret this, the type of scan, location of the lesion, and suspected abnormality are all taken into account when this terminology is used.
Feel free to ask me any questions you need-
I know it is difficult to understand.
Now I understand what you are looking for.
The high- signal issue can mean different things- but it also depends on which images of the MRI this was read. There are images called T1-weighted,and T-2 weighted, and often the signal is opposite or different between the two. Most reports indicate T2 findings more commonly.
I don't want to assume, but I can give you some basics...
A 2 cm lesion in the spinal canal is either a separated lesion, or arising out of nerve cells or bone cells. The possibility for such a lesion can be one of the following:
--Abscess, Blood filled cavity, Inflammatory lesions, and then of course, a tumor.
Because this is in the canal and not the vertebra or disk, it is not likely a finding due to Spinal arthritis.
In many cases, blood and infection can appear this way, but if it is well-circumscribed and easy to see as a separate lesion from the cord, it is possible to be a tumor also. 5% of cancers arise from the spine, less so the canal, and many are metastatic. And- keep in mind most tumors are benign. So- to help in the sinister area is difficult, because T1 images differ in the reading from T2, and a cancer can be low signal in one, but high signal on the other.
Canal tumors typically arise from Nerve cells or bone cells-- if the mass is distinct as above-- this can also be finding for infection or a hemangioma - a benign blood filled mass. Others are neurofibroma, schwannoma (both nerve cell tumors), and meningioma for benign tumors. Cancer can show as a metastasis from another tumor, or a lone lesion such as an astrocytoma (a brain cancer), or a hemangioblastoma(Children more likely).
Without more information, though, I can't tell you what you want to know specifically.
I wish I could.
If you have other questions, or know if this reading was based on T1 or T2 weighted images, please let me know.
Hopefully, if you are otherwise well, the odds will work in your favor.
Ask me anything you need-
All my best wishes--
This gets back to the original thoughts I had in that lesions in the spinal canal can "arise" out of other tissue or be a separate problem.
The hemangioma, a most common finding, will present this way as blood is high-signal.
However, 3 of the tumors can also present this way: astrocytoma, ependymoma, and hemangioblastoma. These are malignant.
Benign tumors can be a meningioma, schwannoma, or neurofibromas.
Infection (circular would be an abscess) can be either high or low.
Your symptoms could be from the tumor pushing and the reading would then say "mass-effect."
Yes- these could be symptoms from the cerebellum, it is close enough.
A tumor in the canal can raise your intracranial pressure and explain your symptoms as well. .
I wonder if you suffer from increased pressure- and the way to determine that is with a spinal tap. If they do a spinal tap for diagnostic reasons, they can send the fluid for cells, and perhaps learn what the lesion is that way.
Beyond this, my friend, I don't have more to add about the MRI-
I will ask a neurosurgeon about this-- see what he has to say and drop you a note tomorrow(Monday). Would that be helpful still?
I will do that. No fun being in suspense with this on your mind.
You ve been fantastic thank you so much. The other findings seemed to be ok. I would very much value the opinion of a neurosurgeon as it may help me to deal with all as our National Health Service in UK is extremely slow in arranging follow up appointments etc. Once again thank you SO much and i look forward to hearing from you soon
Love and Light
OK. Will be in touch tomorrow.
I am going above and beyond for you on this one because I can only imagine your anxiety and worry, and want to make sure you get as much good info as possible.....
It would be great if you would consider another accept on the new info I find, or a bonus.... Just hinting.......
No need respond to this one- wait til I send info tomorrow.