Felix Boller and his mom Becky are shown in this file photo.

CEDARBURG - After months of aggressive chemotherapy and numerous medical setbacks, there is finally good news to report on the health of 7-year-old Felix Boller.

An MRI at Children’s Hospital of Wisconsin last week showed no images of the tumors that have infested his brain and spine for the past 10 months.

The doctor told Felix’s mother, Becky, that the tumors were "virtually gone."

"He said they saw nothing in the spine, nothing in the ear canals, nothing in the ventricles!" Boller wrote in her son’s online journal at www.caringbridge.com.

But she cautioned Monday that the results do not mean that Felix is out of danger.

"He’s not cancer-free by any means," she told the News Graphic. "We’re hoping the chemotherapy gets any remaining tumors. That’s the best you can hope for."

As recently as mid-December an MRI showed between eight and 15 tumors in Felix’s brain and a new one forming in his ear canal.

He has been hospitalized at Children’s since Dec. 21, undergoing painful radiation and high-dose chemotherapy treatments.

He was allowed to go home briefly over the weekend and early this week.

On Monday he stopped by Thorson Elementary School to visit with his classmates and teachers.

"He said it was great," Becky Boller said of her son’s visit.

Students and staff at Thorson were so pleased to hear the good news about Felix last week, that they all wore the red T-shirts that were made for a fundraising walk held in his honor last month.

"We were all so excited," Thorson Principal Karen Noel said of the MRI results. "It feels like all of that positive spirit is at least working."

Felix returns to Children’s Hospital today, where he will continue to undergo high-dose radiation.

Lisa Curtis can be reached at lcurtis@conleynet.com