The community rallied around Tahira in an attempt to raise the $70,000 needed for surgery.
Despite a quiz night and concert organised earlier this year, supporters were able to raise only about $25,000.
There are only two neurosurgeons in Australia capable of performing the delicate operation which might help Tahira.
The brave teenager saw one of the neurosurgeons, Charlie Teo, with her mother Tasma Dawson.
‘We saw the pineal cyst and the tumour on the pituitary gland and the cyst in the sinus area for the first time properly,’ Ms Dawson said.
She said Tahira’s headaches and symptoms were caused by the cycst compressing on the pineal gland, which blocked an aqueduct, causing spinal fluid to build up.
‘Dr Teo says there are no guarantees that the surgery will fix her problems,’ Ms Dawson said.
‘There is the risk of a stroke, risk of fatality and visual disturbances that are long term.
‘There is the chance that removing the pineal cyst will, as in many other cases, eliminate all her symptoms but, as with all procedures, there are never any guarantees.
‘So basically, Tahira needs to assess all the information she has and decide if the risk is worth it to her.’
Ms Dawson told Tahira not to let the money situation sway her decision. She said if Tahira decided to have the surgery, she would find the money.
‘Tahira is in turmoil,’ she said.
Ms Dawson thanked everyone who had supported the family over the past six months.
‘It has been greatly appreciated,’ she said.