A student is fundraising for children with cancer after he defied medical odds by beating a brain tumour three times . Chandos Green , a student at Chichester University , West Sussex , must still have annual MRI scans after he endured three risky surgeries merely to survive to the age of 19 . And now , just months after his last operation , he is already training for the 2015 London Marathon in the hope he can raise thousands for the charity Children With Cancer UK . Survivor : Chandos Green , 19 , who has battled a life-threatening tumour three times . Right shows the scar on his head from his most-recent operation to remove the tumour at Southampton General Hospital . Fighter : Despite surviving his last brush with death less than a year ago , Chichester University student Mr Green is now training to run the London Marathon this year to raise money for a cancer charity . Speaking of his latest brush with death - only averted when surgeons removed a golf ball-sized tumour - Mr Green said : ' I remember asking the surgeon if I was going to die and I broke down when I was going under the anaesthetic . 'Luckily I was fine and managed to beat the tumour once again . But the operation made me realise that life can be short . ' Mr Green , from Bournemouth , Dorset , appeared to be a healthy toddler until , at the age of three , he began suffering dizzy spells and falling over unexpectedly . After his worried mother took him to see their family doctor , her son was referred to Poole hospital where specialists diagnosed a brain tumour . Brain surgeons at Southampton General Hospital were able to remove most of the tumour , but were unable to take out parts that were close to Mr Green 's motor neurons - the essential circuits that connect the brain to the muscles . Mr Green remembered : 'When they discovered the tumour I was still really young but I remember being in the hospital and being confused by it all . ' I recovered quickly from the operation and managed to start school but that 's when the problems started . 'Initially people did n't say anything about my scars but then people kept coming up to me and asking what happened to my head . 'They began to notice the tumour had given me a limp and I had lost movement in my left wrist . ' Fighting for his life : A picture of Mr Green aged three recovering from the first of his operations to remove the tumour in his brain . It was diagnosed after he began suffering dizzy spells and falling over . Tests : Mr Green aged five . Despite the success of Mr Green 's first operation , his symptoms soon returned and he was forced to undergo a second operation at the age of six to again remove his brain tumour . Recovery : Mr Green aged six , following his second operation . He remained cancer free for the next 13 years until he enrolled at Chichester University , when the familiar symptoms began to reappear . With the same symptoms reappearing just a couple of years after his first fight with the tumour , a new MRI scan showed Mr Green 's tumour had regrown . Aged just six , he was once again forced to go under the surgeon 's knife for a risky operation to remove the growth and save his life . Again he recovered and returned to school . But this time he fell victim to cruel classroom bullies who dubbed him 'tumour boy ' . Despite the taunts , Mr Green rebuilt his life , enjoying a normal adolescence and completing his GCSEs and A-levels . But when he enrolled at Chichester to begin his degree , all-too-familiar symptoms began to return . ' I started studying social work and the beginning of it was great until I started to get headaches . 'One day when I woke up early to go on a trip and I fainted in my room and woke up three hours later . 'It was then that I realised that something was n't right and I went to the hospital to get some checks done . ' Just a day after his 19th birthday , Chandos received the devastating news he would have to battle the life-threatening disease for a third time . ' I was now old enough to fully understand what was going on and I was so scared going into the operation , ' he said . Steve Clifford , a Professor of Molecular Paediatric Oncology at Newcastle University , said : 'It is possible that some brain tumours may return some time after they were first treated . 'However it is rare for a brain tumour return three times , especially when the individual 's lay dormant for 12 years . '
London Marathon survived brain surgery at three , six and 19 years old . Just months after his last brush with death , he is training for a marathon . The keen runner hopes to raise money for a children 's cancer charity .