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--