With a diagnosis of 5 tumors in her brain and spine, Felicity is facing a struggle, but you wouldn't know it by the constant smile on her face.

But the family was in for something much scarier.

Felicity’s pediatrician suspected she might have a condition that causes fluid build up inside the brain — known as hydrocephalus — and ordered an ultrasound, which led to a CT scan, which led to a stay in the pediatric intensive care unit.

Felicity's family was given the news that a giant cyst was pushing Felicity’s brain aside, essentially mashing it into her skull.

And this still wasn’t the worst news.

Felicity had a total of five brain and spinal tumors called desmoplastic infantile astrocytoma: not cancer, but aggressive and deadly all the same.

The family sought a referral to St. Jude Children’s Research Hospital and arrived on Father’s Day 2017.

Her diagnosis is immensely rare.

But St. Jude is leading the way the world understands, treats and defeats childhood cancer and other life-threatening diseases. Felicity’s doctors quickly came up with a plan.

Felicity received several different chemotherapies that succeeded in shrinking her tumors. She also received supportive care, like physical, occupational and speech therapies, and lots and lots of love.

Her parents have been able to take their happy baby home, but St. Jude continues to monitor her closely, and she returns often for checkups and scans.

Felicity almost shares a birthday with St. Jude founder Danny Thomas.

While she was in treatment, clinic staff celebrated her first birthday on the same day they commemorated Danny Thomas’s birth (Jan. 6), to her family’s delight.