In the year following her diagnosis Aariyah underwent weekly chemotherapy. In recent months that's been reduced to fortnightly so she doesn't become too resistant to the chemotherapy.
So far she's done 56 lots of chemotherapy, although the doctors have told Ms Rumbal it's not working the way they hoped it would. If that continues, they'll review treatment in June.
"The doctors are out of their depth, I'm out of my depth."
She said there was the risk the lesions would spread, and attack other parts of Aariyah's body - like her eyes.
Ms Rumbal, who is a solo mum of four children, said she'd been so focused on day-to-day life with Aariyah and her other children that she hadn't concentrated too much on the bigger picture and future.
But she'd been encouraged by her dad to set up a fundraising Give a Little page to help explore alternative treatments for Aariyah, including moving overseas to be closer to doctors with better knowledge of the condition.
Ms Rumbal said friends had started referring to Aariyah as the "girl in the bubble" as she didn't go outside unless she was in a covered pushchair, to minimise the risk of infection.
For that same reason, she and the four kids didn't go out too much, she said.
To donate, go to https://givealittle.co.nz/cause/aariyahsjourney.