What Does This Lab Report Indicate?
I read your question carefully and I understand your concern.
The first part, about the C6-7 encroachment means that thee is a bony spur, due to chronic arthritic changes of the spine, which is invading the foramina, the canal from which the nerve root leaves the spine. If there is nerve compression that may manifest with pain or other abnormal sensations along the trajectory of the nerve. That doesn't necessarily have to be the case though, it is a moderate encroachment, there may still be space for the nerve, so has any significance only if you have such pain.
The second part is inconclusive, because there is an abnormality in the spinal cord but the radiologist is unable to say whether there is some damage to the spinal cord or if it is a motion artifact, a misrepresentation of the machine because of the fact that you have moved and the images are not that clear.
So that report can't be interpreted alone, it depends again from symptoms and signs, it is significant if the doctor has found signs indicating spinal cord damage (muscle weakness, changes in the reflexes etc). If there are no such sign there may be no damage at all but simply an blurring created by movement.
I remain at your disposal for other questions.
If you mean bad in the sense of life threatening, then no, there is no indication of anything life threatening there, nothing related to the cancer.
The doubt is only regarding chronic arthritic changes of the spine, which while not dangerous may cause pain and movement limitations. As I said though the exam itself is inconclusive in that regard and should be related to the symptoms you have (of which you mention nothing) and the signs on the neurologic examination.
I hope to have been of help.