(Reuters) - The world faces a rapidly growing burden of cancer which will overwhelm governments unless the medical and pharma industry takes the lead on a multi-billion dollar private-public fund, oncologists said on Monday. In a report on how rates of cancer diagnosis and death are rising across the world while access to diagnosis and treatment is extremely patchy, experts described the economics of the problem as daunting and current financing models as broken. "It is bad to have cancer, and worse to have cancer if you are poor," said Professor Peter Boyle of France's International Prevention Research Institute, a lead author on the "State of Oncology 2013" report.