Sally Roberts said in an interview that her legal team has made an application to appeal against the decision to treat her son Neon's brain tumour with radiotherapy, adding that she intends to sue if he suffers side-effects.
She told the Daily Mail: "I've been told I’m an irresponsible parent. I feel backed into a corner. It is taking away my human rights as a mother. Neon is my son. How dare the state impose their treatments on my son? They are not allowing me as the mother to make these decisions.
"If I’d been given the extra time I asked for to research these other therapies in more detail, things could have turned out differently."
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The annual event has earned a place in the record books ahead of the grand final of the 60th anniversary show in Austria this evening.
Local authorities said the move is necessary to "avert the growing number of deaths and increasing harm linked to psychoactive substances".
Some students argued that the centuries-old tradition of wearing gowns, suits and mortarboards to exams was 'archaic' and looked elitist.