CINCINNATI -- The daughter of a Cincinnati Bengal who has already been through so much has another big day ahead of her.

Leah Still -- Devon Stills daughter -- will undergo a stem cell transplant procedure on Tuesday. The stem cell treatment is an effort to regenerate her bone marrow and stem cells.

Still flew to Philadelphia Monday to be with Leah. They went shopping at a mall.

The smile you have after shutting down the mall, literally. This girl had security and the... http://t.co/HHWtLhf4pf pic.twitter.com/QFRMJsdlCX

Still tweeted another photo Tuesday while they waited for her treatment to begin.

Selfies in the hospital to pass time by as we wait for the stem cells http://t.co/q6JZOIyi9q pic.twitter.com/ogB0J0Gitg

Leah was diagnosed with stage 4 neuroblastoma in June. She had surgery to remove a tumor from her abdomen in September, followed by chemotherapy to try to remove the cancer from her bone marrow.

She has already been treated with a round of chemotherapy and radiation.

Devon Still said the family hopes that will be her only round of chemo and radiation but that it depends on how her results come back. He said it will take four to six weeks to determine if more treatments are necessary.

Follow Devon Still's updates on Twitter at @Dev_Still71

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Leah Still to undergo stem cell therapy