Dr. Marc Louis Otten, M.D.

Unless there is a reason you cannot have an MRI, most tumors also require one to best visualize the tumor. Sometimes more advanced imaging is also necessary.

No, the decision to proceed with surgery depends on many factors. Some are just observed.

It depends on the kind of tumor, and its location. Some can be watched with serial imaging, and may never need surgery. Some need surgery urgently.
Your friend should send in the images for review.

You need to ask your surgeon. It depends on many factors, both related to the tumor and to your job. Some patients return to work that week. Others need more than a month to recover.

If these symptoms were not present before surgery, it stands to reason that the new symptoms could be related to the surgery. A thorough exam to assess the vision is important, and this is something that should be discussed with your friend's surgeon.

Tumors can be of all different types. Some are cured with surgery. Some cannot be cured.

The answer to this question depends a great deal on the nature of your injury. Mild traumatic brain injury that does not require surgery sometimes leaves people with headaches or difficulty concentrating. A trauma that was significant enough to require surgery likely represents a greater impact, and as such, can certainly cause residual symptoms. You should follow up with your surgeon if you have concerns, as he would know the details of your situation.

There are many reasons people experience pain shooting down the leg. Irritation of the sciatic nerve, or "sciatica", is just one of them. Before drawing conclusions, it is important to have the entire history, combined with a physical exam, and sometimes additional testing.