A judge has ruled a young boy has to be given intense chemotherapy for a brain tumour, despite his parents objecting to the treatment.

Angela Kiszko and Colin Strachan, from Perth, were told by the Western Australian Family Court their six-year-old son, Oshin, has to start the medical care last week.

Oshin was was diagnosed with medulloblastoma last December, however his parents do not want him to get chemotherapy and radiotherapy because they do not want their son to become a 'lab rat', the West Australian reports.

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A judge has ruled a young boy, Oshin (pictured), has to be given intense chemotherapy for a brain tumour, despite his parents objecting to the treatment

Instead of the cancer treatment, Ms Kiszko and Mr Strachan want to put their son on palliative care.

The court was told Oshin would die in the next few months without treatment, however they admitted the chances of him surviving more than five years even with the treatment were slim.

According to the newspaper, Family Court chief justice Stephen Thackray was told the six-year-old had a 30 per cent chance of surviving more than five years on chemotherapy, and a 50 per cent chance on chemotherapy and radiotherapy.

Despite it being against the odds, Judge Thackray said the chance of a cure in the future 'is the matter that most heavily must weigh in the decision'.

Angela Kiszko (middle) and Colin Strachan (back), from Perth, were told by the Western Australian Family Court their six-year-old son, Oshin, has to start the medical care last week

Ms Kiszko said she did not want to put her son through the treatment after seeing what it had done to her mother and step-mother - both of whom died of cancer.

'I have watched and learned what all these children and their families go through and it is nothing short of toxic hell,' she said, according to the West Australian.

'The children are not really alive, they are completely drugged and exhausted and on the verge of death.

'It almost feels like Nazi Germany and I am honestly sickened by the treatment of all these children.'

Mr Strachan posted an emotional message on social media, saying he was 'watching young Oshin getting sick' once the treatment started and he couldn't stop it

Mr Strachan shared an emotional message on Facebook last week, along with a picture of him and his son.

'Today is Oshin's 6th birthday and his 6th day of court imposed Chemotherapy as sad as it is i will work at making it a beautiful day for him,' the post read.

'I love you my little soldier may your strength and determination get you through all this.'

Mr Strachan posted another comment about the treatment, saying: 'Just when you think you know what pain is something comes along to show you some more. In hospital watching young Oshin getting sick and there is not a f***ing thing i can do about it.'

The court was told Oshin (pictured) would die in the next few months without treatment, however they admitted the chances of him surviving more than five years even with the treatment were slim

Family friend Lynda Jones started an online petition to 'stop forced medical treatment', adding Oshin's parents have been 'treated as criminals' after opting not to let their son have 'debilitating chemotherapy and radiation treatment'.

'They were told if he were to survive the treatment, he would be severely incapacitated for the rest of his life,' the petition reads.

'The parents opted not to do this and were more confident in following specialist, non-invasive treatments available offshore. That was when the nightmare began.

'Then four months after the initial diagnosis, the parents were summoned to the Family Court in Western Australia, where the judge used the legal power bestowed on him to override the parents decision... against their will and with the understanding that the chance of survival was not good.