<p>A previously fit and healthy amateur boxer is taking on his biggest fight yet - a form of children's cancer rarely seen in adults.</p><p>Christopher Sparks, 37, was diagnosed with neuroblastoma last year after feeling ill following a holiday to Turkey.</p><p>But doctors believe his tumour may have first started growing ten years ago - despite his active lifestyle.</p><p>Christopher has since undergone several rounds of chemotherapy and radiotherapy to eradicate the disease, and is on track to beat it with further intensive treatment.</p><p>Neuroblastoma is rarely seen in children, let alone adults - affecting around 100 youngsters in the UK each year.</p><p>Christopher said medics told him he is just one of two adults in the nation diagnosed with the condition at the moment.</p>
