Family Asks for Birthday Cards for Boy Who Survived Brain Cancer

— -- A Colorado family of a boy who survived brain cancer is hoping people around the world will send him birthday cards.

Logan Green, 6, received "get well" cards from his kindergarten class after his brain surgery on March 17.

"We gave him those cards two hours after he got out of surgery," Logan's mom, Crisandra Green of Colorado Springs, told ABC News today. "When we saw how big of a smile it put on his face we thought, 'What can we do for his birthday?' We wanted to do something special that didn't take all his energy."

Green, 30, a mom of five, said Logan was diagnosed with a brain tumor in June 2014 after collapsing in the house.

"[Doctors] said nothing could be done and the tumor was in his brain stem and we needed to say our goodbyes," she recalled.

After the Greens were encouraged to get a second opinion, Logan was later taken to Phoenix Children's hospital where doctors removed Logan's tumor and he was "completely cancer free," Green said.

"The doctors were amazing and there was finally hope for us," she said.

Despite having to learn walking, talking and swallowing again, Logan eventually healed.

But one month ago, Logan had a stroke and was diagnosed with Moyamoya--a disorder caused by blocked arteries in the brain.

Warren Selman, director of the Neurologist Institute at University Hospitals Case Medical Center in Cleveland, Ohio, said that Moyamoya can sometimes result from receiving necessary therapeutic radiation.

"Moyamoya is the narrowing of the blood vessels so that can lead to one or two problems," Selmen told ABC News. "It can either lead to small vessels rupturing, causing the stroke, or not enough blood supply--leading to the stroke. Either way, they can lead to strokes and those strokes can lead to the focus of the seizures."

Green said Logan had a second surgery two weeks ago to fix the blood vessels in his brain.

"He did really well except the next day he had a pretty big stroke," Green said. "He lost his vision that day for a little while but gained it back completely. Other than that, he has to take it easy right now."

Logan was in the hospital for five days and is now at home recovering.

In an effort to keep him smiling, the Green family has put a call on Logan's Facebook page, "Prayers for Logan," for people across the globe to send him cards for his 7th birthday on April 5.

"Logan is hilarious, he always has everybody laughing," Green said of her son. "He has been through more than most people do in their whole lives. He's truly a superhero. Funny enough, my husband named him Logan after 'Wolverine,' and we always joke that he has those powers. We want him to be able to look back on this, read these cards, and see his scars and be proud. He is just so inspiring, it's unbelievable."

Logan's already received over 100 cards, Green said.

Cards for Logan's birthday can be mailed to: 3472 Research PKWY Suite 104-571, Colorado Springs, Colorado, 80920.