Allison Schablein released Boston Childrens Hospital

When this little girl was diagnosed with a cancer so rare that there was no specific treatment for it, doctors created a “precision medicine” designed just for her condition.

Allison Schablein was only four-years-old when doctors found multiple tumors in her brain and spine. After four months of treatment, her cancer — a type called anaplastic astrocytoma — became resistant to chemotherapy and started spreading.

Her doctor at Dana-Farber/Boston Children’s Cancer and Blood Disorders Center knew the research hospital was testing a cancer drug that targeted a specific mutation in melanoma. The doctor knew Allison’s cancer had the same mutation and wondered if a variation of the drug could work for her.

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This type of treatment is called “precision medicine” because it uses the patient’s genetic information to help target a precise molecule in cancer cells. Chemo takes a much broader approach — trying to kill of lot of cancer cells quickly.

The more targeted therapy of precision medicine can have stunning results.

Allison took two pills each day for two months and when she went back for a brain scan, doctors there couldn’t find any trace of the cancer.

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“I stood up and screamed,” her father, Dan Schablein told ABC News. “It was just shocking and the most incredible feeling.”

Though technically not “cured,” the New Hampshire girl has led a normal life for years, and continues to take the drug to prevent a return of her cancer.

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The Dana-Farber Center hopes to help other children with the same kind of rare cancer as Allison who feel they are out of options.

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