Doctors hope a new vaccine tells brain tumors to stay away for good the experimental treatment, in Friday's Medical Moment.

Every year, 10,000 people in the US are diagnosed with the most aggressive and most common form of brain cancer.

Even after surgery, radiation and chemo, doctors say the tumor returns in 95 percent of cases. Now, researchers are testing a new vaccine that aims to stop the cancer from coming back.

Peter Rauch was just about to celebrate his 70th birthday when he got the news, brain cancer.

"I thought maybe I was getting dementia or something like that. I just didn't feel quite right," cancer patient Peter Rauch said.

He had a craniotomy, where surgeons remove part of the skull and cut out the cancer.

The operation went well, but doctors are always concerned the tumors will come back.

"They infiltrate into the brain, and we can take out the majority of them, but there are microscopic cells that go into the brain that are very, very hard to treat," Dr. Ted Schwartz Neurosurgeon at NY Presbyterian and Weill Cornell Medical Center said.

Peter is testing out a new vaccine. It works by training his immune system to target and kill cancer cells.

"With new treatments like tumor vaccines, we can actually rev-up the body's own immune system to target and treat those tumors," Dr. Schwartz said

In phase two trials, patients who got the vaccine were free of cancer for about 16.5 months and survived nearly three years.

Those who didn't get the shot saw their cancer progress six months later. They survived a little over a year.

"We've been doing this for many years. It helps to stave off disease, but is not a cure. Now, we have a treatment that potentially can increase the number of long-term survivors," Dr. Schwartz said.

"I don't think I'm back to where I was before the surgery, but I'm getting closer," Peter said.

So far, Peter's feeling good, and grateful for every day his cancer stays away.

Patients in the trial receive monthly injections as long as the tumor has not returned.

To be eligible for the trial, patients must be over 18, have a newly diagnosed brain tumor and recently had surgery to remove it.

To read the research summary for Friday's story click on Medical Moment

CURRENT TUMOR TREATMENTS: The Mayo Clinic says surgery is the initial therapy for patients with brain tumors and that surgery alone can cure most benign tumors. Although brain surgery used to mean large incisions in the head, removal of bone and drilling through the side of the face, endoscopic surgery has made it possible for neurosurgeons to access tumors through small incisions and even natural openings like the nose. For patients with cancerous brain tumors, treatment usually continues after surgery in the form of radiation and or chemotherapy.

BRAIN TUMOR VACCINE: Researchers are testing a vaccine that trains the body's own immune system to attack brain cancer cells. It works by looking for a specific marker on cancer cells linked to the disease. "We know that our own immune system is the most powerful weapon that we have to attack disease, and if we can rev up our own immune system to attack these tumors, we can have outcomes that are much, much better than we've ever had in the past," Ted Schwartz, M.D., a neurosurgeon at New York-Presbyterian Hospital in New York, N.Y., told Ivanhoe. To be a candidate for treatment with the vaccine, patients have to have undergone surgery to remove the tumor, as well as chemotherapy and radiation. Doctors also have to assess whether or not a patient's tissue has the receptor that the vaccine targets. If it does, a patient can receive the vaccine as long as the tumor doesn't return within six weeks of standard treatment. Dr. Schwartz says about 20 to 30 percent of patients who have their tissue biopsied are candidates for the trial.

FOR MORE INFORMATION, PLEASE CONTACT: Andrew Klein Public Affairs New York-Presbyterian Hospital/Weill Cornell Medical Center (212) 821-0560.