The seven-year-old is in the Royal Children's Hospital in Melbourne after she was diagnosed with Wilms tumour.

The aggressive cancer, which is usually found in children aged two to five, has attacked her right kidney and left lung and has been confirmed as stage four.

Erin's grandmother Kylie Rundell said Erin had undergone six weeks of chemotherapy.

"She had a scan done to see if the chemo was working and they were impressed with the results so she was able to go in and have her surgery," she said.

Doctors took the affected kidney and removed the tumour.

"Then they went up to her lung and took some of that tumour," Ms Rundell said.

"She still has small amounts floating around and will need more chemo and radiation to fight that - how much and for how long will depend on the tests that come back from the kidney, lung and tumors that were removed."

Ms Rundell said doctors were happy with the results of the surgery.

"The only problem they encountered was excess scarring, which made it a bit harder for the lung part of it," she said.

On Monday night, Erin's grandfather Darren Compton put a smile on her face by having his head live on Facebook.

The family has set up a bank account for donations.

Details: Erin Compton, BSB: 063 536, Account number: 1037 1814

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