DUBLIN student nurse Sean Lyne desperately wants to travel to the US for lifesaving treatment for a brain tumour and Parkinson's disease.
Sean (19), from Crumlin, was diagnosed just after Christmas when he developed problems with his eyesight.
His best friend, Aaron O'Reilly, said that Sean was studying nursing at Inchicore College of Further Education and had planned to study for his degree in England when his life changed completely.
"Around Christmas time, he starting seeing white lights in the middle of his vision," Aaron said.
"He went to an optician twice but they said there was nothing wrong.
"So he eventually went to the eye and ear hospital where they found that he had a tumour.
"In February, doctors did a biopsy and realised it was stage five glioma -- he was basically told they couldn't operate."
Aaron (20) said that the tumour is stemming from under Sean's brain and is resting on his spinal nerves.
"Doctors told him the tumour was in the worst possible place," he said. "If anything happened during the operation, he would be paralysed."
The teen has already gone through radiotherapy, chemotherapy and steroids.
And when Sean took a break from the treatment, he then developed excruciating headaches.
"Doctors told him that his brain was swelling so much as a result of the radiotherapy," Aaron said.
"He has really bad vision -- he has to keep one eye closed all the time otherwise he has double vision.
"He also now has a mild form of Parkinson's -- when he sits down his hand can start shaking.
"The doctors here said there is nothing they can do. But all we can do is fight against it."
Now his extensive network of friends from school and college have joined together to try to fundraise to send him to a hospital in Texas where they are developing treatment for this particular glioma.
"Everybody is really worried about him, but he's worried about other people. He's joking and laughing and staying positive. It's so hard seeing him not able to get around," said Aaron.
"There are specialists in America -- they are going through trials at the moment and they are in their third clinical trials at this stage but it costs €80,000," Aaron said.
Sean's friends are holding a benefit night on September 3 in the Four Roads Pub in Crumlin to raise funds. To make a donation: The Sean Lyne American Fund: sort code 931020 A/C number 25936099.