"It's a rare childhood cancer, and for me to get it at the age of 21, there wasn't a very good chance of me surviving that."
Initially, surgery to remove the tumour in her face was too difficult.
She had to undergo chemotherapy and radiation to shrink the growth instead.
After this initial treatment, surgery became an option for Ms Te Meihana, and the tumour was removed.
There was an 80 per cent chance the tumour would return within three years - but it didn't. Five years later, she is in remission.
She joined CanTeen "from the get-go", she said, and the programmes helped her through, particularly with her unfounded feelings of guilt.
"A lot of cancer patients have a lot of guilt.
"They're amazing, they've just done so much for me and not just for me but my family as well."
Ms Te Meihana's two brothers, now aged 19 and 21, also joined CanTeen as "sibling members" after their sister's diagnosis. They would be helping out at this year's Mega Walk.
"They will probably be marshalling," Ms Te Meihana said.
The EIT student has not done any special training for the 15km walk.
"Nothing more than what I usually do on a day-to-day basis."
She already kept fit by playing netball and walking regularly as part of her daily routine.
The average time to complete the Half Mega was 2.5 hours. It would leave from Awatoto at 9am.